CN101797471A - Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment - Google Patents
Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment Download PDFInfo
- Publication number
- CN101797471A CN101797471A CN 201010151306 CN201010151306A CN101797471A CN 101797471 A CN101797471 A CN 101797471A CN 201010151306 CN201010151306 CN 201010151306 CN 201010151306 A CN201010151306 A CN 201010151306A CN 101797471 A CN101797471 A CN 101797471A
- Authority
- CN
- China
- Prior art keywords
- reducing agent
- water reducing
- condensation
- tail gas
- water
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 46
- 150000004002 naphthaldehydes Chemical class 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004064 recycling Methods 0.000 title abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000009833 condensation Methods 0.000 claims abstract description 29
- 230000005494 condensation Effects 0.000 claims abstract description 29
- 239000007921 spray Substances 0.000 claims abstract description 27
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000004821 distillation Methods 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 230000002378 acidificating effect Effects 0.000 claims abstract description 6
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 5
- 238000006482 condensation reaction Methods 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 53
- 239000000463 material Substances 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 3
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000006277 sulfonation reaction Methods 0.000 description 2
- 238000001354 calcination Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- CBYZIWCZNMOEAV-UHFFFAOYSA-N formaldehyde;naphthalene Chemical compound O=C.C1=CC=CC2=CC=CC=C21 CBYZIWCZNMOEAV-UHFFFAOYSA-N 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment thereof. The method comprises the steps of: a, condensation; b, neutralization; c, distillation; and d, recovery of condensed and uncollected gas after spraying. The equipment comprises an intake pipe and an air outlet, both of which are connected with an outlet of tail gas generating in the sulfonated naphthaldehyde water reducing agent production, wherein a condensation kettle and a spray tower are sequentially connected between the intake pipe and the air outlet, the condensation kettle is sequentially connected with a recovery liquid bath and a distillation kettle through a pipeline, the spray tower is communicated with a first regulating tank by a pipeline, and the distillation kettle is communicated with a second regulating tank by a pipeline. The invention more completely processes harmful materials in the tail gas, basically eliminates naphthalene and acidic harmful gases, and reduces the environment pollution caused by the tail gas; the recycled liquid can be reused in the sulfonated naphthaldehyde water reducing agent production, the recovery rate of the tail gas is higher, and the cost of the sulfonated naphthaldehyde water reducing agent production is further reduced.
Description
Technical field
The present invention relates to a kind of concrete admixture sulfonated naphthaldehyde water reducing agent building-up process exhaust gas treating method.
Background technology
Nineteen sixty-five the succeeding in developing of sulfonated naphthaldehyde water reducing agent, indicate that then the cement concrete material scientific and engineering has entered a New Times.According to statistics, sulfonated naphthaldehyde water reducing agent accounts for China's water reducer 70%.As long as the naphthalene water reducer of the 0.5%-1.0% of admixture by mass of cement just can make concrete flowability improve significantly; If be not purpose to improve liquidity and to improve intensity, then the admixture naphthalene water reducer then can make the cement consumption in the concrete reduce 10%-20%.The concrete of admixture water reducer not only performance improves significantly, and can utilize industrial solid castoff simultaneously in a large number, as flyash, blast furnace slag powder, steel-making slag powder, calcining coal gangue, metakaolin etc., make that cement consumption further reduces in the concrete.As seen, the development and production of naphthalene water reducer and extensive use have not only been made huge contribution to the performance raising aspect of concrete material, and have established important foundation for the concrete energy-saving and cost-reducing and flat raising of sharp waste water.Naphthalene water reducer occupies very special and crucial status in water reducer family, in considerable time from now on, this special and consequence can not shaken.But the development bottleneck of naphthalene water reducer is that environmental issue is that sulfonation process gives off naphthalene, water, sulfur dioxide sour gas vent gas treatment problem at present.
As shown in Figure 1 for having the equipment of conventional process tail gas now, this equipment only utilizes spray process to handle tail gas, its irrational place of this processing mode, mainly be to use the alkalescent water spray, producing some organic salt materials when absorbing the sour gas in the tail gas, these salts substances can disturb the condensation reaction quality, cause a large amount of shower waters can't reclaim use, can not efflux again, produced secondary pollution, can not change shower water for a long time, the concentration of water is more and more higher, and the effect that spray absorbs is just poor more, at last environment is polluted.
Summary of the invention
One of technical problem to be solved by this invention is to overcome the prior art deficiency, provide the vent gas treatment of the sulfonated naphthaldehyde water reducing agent production that a kind of vent gas treatment recovering effect is good, environmental pollution is little to utilize method again.
For solving the problems of the technologies described above, the present invention realizes by the following technical solutions:
A kind of vent gas treatment of sulfonated naphthaldehyde water reducing agent production is utilized method again, it is characterized in that, this method step is:
A, condensation are with the naphthalene in the tail gas, SO
2Acid gas condensation becomes naphthalene, sour coexist liq;
B, neutralization neutralize the acidic liquid that produces in the last step;
C, distillation, through a, the redistillation of b process liquids, naphthalene gas, the liquid of Xing Chenging has been removed can reclaim fully behind the composition that disturbs condensation reaction and has been used for hydrolysis of water reducer production process or condensation operation once more thus;
D, spray reclaim after the uncollected gas of condensation is through spray; This moment, shower water concentration was lower, can reclaim fully to be used for water reducer production and operation.
Wherein, spraying the shower water that is adopted is the weak base water of pH value between 7.5 to 10.0.
And temperature is 3～11 ℃ in condensing steps.And for being adopted as the water spray condensation that temperature is 3～11 ℃ of temperature.
Compare with the exhaust gas treating method of existing sulfonated naphthaldehyde water reducing agent production, the inventive method is more thorough for the processing of harmful substance in the tail gas, has eliminated the naphthalene in the tail gas, SO basically
2Pernicious gases such as acidity, reduced the tail gas pollution on the environment, and the liquid after the recycling can use during sulfonated naphthaldehyde water reducing agent produces once more, and is also higher to the recovery utilization rate of tail gas, further reduces the sulfonated naphthaldehyde water reducing agent production cost.
Another technical problem to be solved by this invention provides the vent gas treatment of the sulfonated naphthaldehyde water reducing agent production that a kind of vent gas treatment recovering effect is good, environmental pollution is little and utilizes special equipment again.
For solving the problems of the technologies described above, the present invention realizes by the following technical solutions:
The vent gas treatment special equipment that a kind of sulfonated naphthaldehyde water reducing agent is produced, comprise air inlet pipe and gas outlet in the tail gas outlet that is connected in the production of sulfonation formaldehyde naphthalene water reducer, between air inlet pipe and gas outlet, be connected with condensation still, distillation still and spray column in turn, the condensation still is connected with one in turn by pipeline and reclaims a liquid pool and a distillation still, spray column is communicated with a regulating tank by pipeline, and distillation still is communicated with No. two regulating tanks by pipeline.
As improvement to such scheme, reclaim between liquid pool and the distillation still, between spray column and the regulating tank and distillation still and No. two regulating tanks be provided with the liquid pump that power is provided for liquid flow.
As further improving, described condensation still comprises the kettle that passes through for tail gas, and kettle is provided with the sparge pipe of spray condensed water, and sparge pipe is communicated with the circulation liquid pool by liquid pump.
The said equipment is compared with existing equipment, liquid after the recycling is capable of circulation to be applied in the sulfonated naphthaldehyde water reducing agent production, greatly reduce the harmful substance contents of handling back tail gas, reduced pollution, further reduce the sulfonated naphthaldehyde water reducing agent production cost environment.
Description of drawings
The tail gas treatment device structural representation that accompanying drawing 1 is produced for existing sulfonated naphthaldehyde water reducing agent;
The vent gas treatment special equipment structural representation that accompanying drawing 2 is produced for sulfonated naphthaldehyde water reducing agent of the present invention.
The specific embodiment
For the ease of those skilled in the art's understanding, structural principle of the present invention is further described in detail below in conjunction with specific embodiment and accompanying drawing:
At first, the present invention proposes a kind of method of vent gas treatment of producing at sulfonated naphthaldehyde water reducing agent, this method is better to the filtration assimilation effect of harmful substance in the tail gas, and also can make production cost also lower.Steps of the method are:
A, condensation are with the naphthalene in the tail gas, SO
2Acid gas condensation becomes naphthalene, sour coexist liq;
B, neutralization neutralize the acidic liquid that produces in the last step;
C, distillation, through a, the redistillation of b process liquids, temperature to 180 ℃ is steamed the gas, the liquid that stay collection and has been removed can reclaim fully behind the composition that disturbs condensation reaction and be used for hydrolysis of water reducer production process or condensation operation;
D, spray reclaim after the uncollected gas of condensation is through spray, and this moment, shower water concentration was lower, can reclaim fully to be used for water reducer production and operation;
Wherein, spraying the shower water that is adopted is that temperature is 3～11 ℃ a weak base water.
For implementation method, also designed simultaneously the vent gas treatment special equipment that a kind of sulfonated naphthaldehyde water reducing agent is produced, this equipment comprises air inlet pipe 1 and the gas outlet 2 in the tail gas outlet that is connected in the production of sulfonated naphthalene water reducer, between air inlet pipe 1 and gas outlet 2, be connected with condensation still 3, distillation still 6 and spray column 4 in turn, condensation still 3 is connected with one in turn by pipeline and reclaims a liquid pool 5 and a distillation still 6, spray column 4 is communicated with a regulating tank 7 by pipeline, and distillation still 6 is communicated with No. two regulating tanks 8 by pipeline.
Wherein, condensation still 3 comprises the kettle 31 that passes through for tail gas, kettle 31 is provided with the sparge pipe 32 of spray condensed water, sparge pipe 32 is communicated with circulation liquid pool 33 by liquid pump, at tail gas during by condensation still 3, by the condensation of water at low temperature, make sour gas become acidic liquid, acidic liquid enters to reclaim in the liquid pool 5 and in reclaiming liquid pool 5 by pipeline and neutralizes.
Liquid through neutralization enters in the distillation still 6 by liquid pump again, in distillation still 6, heat the naphthalene fractionation in the liquid is come out, naphthalene gas, the liquid for the utilizing once more that form thus can enter in No. two regulating tanks 8 by liquid pump and store, and stay to be expendable organic salt impurity in the distillation still 6.
Can be by the gas behind the spray column 4 directly by pipeline 2 discharges from the gas outlet, the liquid in the spray column 4 then enters in a regulating tank 7 by liquid pump and stores.
Present embodiment equipment carries out recycling at various recycling materials in the tail gas, formed liquid can be directly used in the hydrolysis, condensation operation of sulfonated naphthaldehyde water reducing agent chemical process, and reduce the gas harmful substance contents of discharging greatly, finally realize energy-saving and emission-reduction.
The foregoing description only is a preferred implementation of the present invention, and in addition, the present invention can also have other implementations.That is to say that under the prerequisite that does not break away from the present invention's design, any conspicuous replacement all should fall within protection scope of the present invention.
Claims (7)
1. the vent gas treatment of a sulfonated naphthaldehyde water reducing agent production is utilized method again, it is characterized in that, this method step is:
A, condensation are with the naphthalene in the tail gas, SO
2Acid gas condensation becomes naphthalene, sour coexist liq;
B, neutralization neutralize the acidic liquid that produces in the last step;
C, distillation, the liquid redistillation after a, b process, gas, the liquid that reclaim distillation back has been removed can reclaim fully behind the composition that disturbs condensation reaction and has been used for hydrolysis of water reducer production process or condensation operation;
D, spray reclaim after the uncollected gas of condensation is through spray.
2. the vent gas treatment of sulfonated naphthaldehyde water reducing agent production according to claim 1 is utilized method again, it is characterized in that: temperature is 3～11 ℃ of chilled waters in the condensing steps.
3. the vent gas treatment of sulfonated naphthaldehyde water reducing agent production according to claim 2 is utilized method again, it is characterized in that: describedly be condensed into the water spray condensation that temperature is 3～11 ℃ of temperature;
4. the vent gas treatment of sulfonated naphthaldehyde water reducing agent production according to claim 1 is utilized method again, it is characterized in that: the shower water that spray is adopted is the weak base water of pH value between 7.5 to 10.0.
5. the vent gas treatment special equipment that sulfonated naphthaldehyde water reducing agent according to claim 1 is produced, comprise air inlet pipe (1) and gas outlet (2) in the tail gas outlet that is connected in sulfonated naphthaldehyde water reducing agent production, it is characterized in that, between air inlet pipe and gas outlet, be connected with condensation still (3) and spray column (4) in turn, the condensation still is connected with one in turn by pipeline and reclaims a liquid pool (5) and a distillation still (6), spray column is communicated with a regulating tank (7) by pipeline, and distillation still is communicated with No. two regulating tanks (8) by pipeline.
6. the vent gas treatment special equipment that sulfonated naphthaldehyde water reducing agent according to claim 5 is produced, it is characterized in that, reclaim between liquid pool and the distillation still, between spray column and the regulating tank and distillation still and No. two regulating tanks be provided with the liquid pump that power is provided for liquid flow.
7. the vent gas treatment special equipment that sulfonated naphthaldehyde water reducing agent according to claim 5 is produced, it is characterized in that, described condensation still comprises the kettle (31) that passes through for tail gas, kettle is provided with the sparge pipe (32) of spray condensed water, and sparge pipe is communicated with circulation liquid pool (33) by liquid pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101513069A CN101797471B (en) | 2010-04-16 | 2010-04-16 | Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101513069A CN101797471B (en) | 2010-04-16 | 2010-04-16 | Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101797471A true CN101797471A (en) | 2010-08-11 |
| CN101797471B CN101797471B (en) | 2012-09-19 |
Family
ID=42593404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101513069A Expired - Fee Related CN101797471B (en) | 2010-04-16 | 2010-04-16 | Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101797471B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389947A (en) * | 2011-11-18 | 2012-03-28 | 冯新林 | Triethylamine gas generation and recovery equipment |
| CN102489121A (en) * | 2011-12-12 | 2012-06-13 | 江苏中凯新材料有限公司 | Method for treating waste gas in production of naphthalene based superplasticizer and special equipment utilizing same |
| CN103865597A (en) * | 2014-03-21 | 2014-06-18 | 宁夏川能化工有限公司 | Emission-free production technology for sulfonate additive |
| CN105597507A (en) * | 2015-12-18 | 2016-05-25 | 河南奥思达新材料有限公司 | Environmentally friendly processing apparatus and processing technology for naphthalene sulfonation exhaust gas |
| CN108623500A (en) * | 2018-06-26 | 2018-10-09 | 云南圣比奥建材有限公司 | The preparation method and Preparation equipment of naphthalene water reducer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56150401A (en) * | 1980-04-24 | 1981-11-20 | Chosei Sasa | Method and apparatus for recovering condensed water |
| CN101314556A (en) * | 2007-05-28 | 2008-12-03 | 重庆达华砼外加剂科技发展有限公司 | Process for recovering residual naphthalin in naphthalin series water reducing agent synthesis |
| CN101585675A (en) * | 2009-06-22 | 2009-11-25 | 江苏特密斯混凝土外加剂有限公司 | Sulphonation method for naphthalene series water reducing agent without naphthalene discharging |
-
2010
- 2010-04-16 CN CN2010101513069A patent/CN101797471B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56150401A (en) * | 1980-04-24 | 1981-11-20 | Chosei Sasa | Method and apparatus for recovering condensed water |
| CN101314556A (en) * | 2007-05-28 | 2008-12-03 | 重庆达华砼外加剂科技发展有限公司 | Process for recovering residual naphthalin in naphthalin series water reducing agent synthesis |
| CN101585675A (en) * | 2009-06-22 | 2009-11-25 | 江苏特密斯混凝土外加剂有限公司 | Sulphonation method for naphthalene series water reducing agent without naphthalene discharging |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102389947A (en) * | 2011-11-18 | 2012-03-28 | 冯新林 | Triethylamine gas generation and recovery equipment |
| CN102389947B (en) * | 2011-11-18 | 2013-04-24 | 冯新林 | Triethylamine gas generation and recovery equipment |
| CN102489121A (en) * | 2011-12-12 | 2012-06-13 | 江苏中凯新材料有限公司 | Method for treating waste gas in production of naphthalene based superplasticizer and special equipment utilizing same |
| CN103865597A (en) * | 2014-03-21 | 2014-06-18 | 宁夏川能化工有限公司 | Emission-free production technology for sulfonate additive |
| CN103865597B (en) * | 2014-03-21 | 2015-12-02 | 宁夏川能化工有限公司 | A kind of nothing discharge production technology of Sulfonates additive |
| CN105597507A (en) * | 2015-12-18 | 2016-05-25 | 河南奥思达新材料有限公司 | Environmentally friendly processing apparatus and processing technology for naphthalene sulfonation exhaust gas |
| CN105597507B (en) * | 2015-12-18 | 2018-04-27 | 平顶山奥思达科技有限公司 | A kind of environment-friendly type processing unit and treatment process for naphthalene sulphonation waste gas |
| CN108623500A (en) * | 2018-06-26 | 2018-10-09 | 云南圣比奥建材有限公司 | The preparation method and Preparation equipment of naphthalene water reducer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101797471B (en) | 2012-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101797471B (en) | Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment | |
| CN104926012B (en) | Treatment process for high-concentration ammonium-nitrogen waste water | |
| CN103480260B (en) | Wet flue gas desulphurization technology by utilization of ethylene waste lye | |
| CN108996865B (en) | Pretreatment method and device for biogas production from sludge | |
| CN106277127A (en) | The mixing of a kind of muddy water, double flash evaporation process the device and method of desulfurization wastewater | |
| CN108341477A (en) | The method of Combined Treatment industrial emissions | |
| Liu et al. | The roles of red mud as desulfurization and denitrification in flue gas: A review | |
| CN109626684B (en) | Treatment device and process for high-nitrate wastewater | |
| CN107473303B (en) | Leachate zero-discharge collaborative ultralow system and method based on waste incineration power generation | |
| CN104860465B (en) | Double-tower catalysis thermal-coupling reflux deamination method and deamination device thereof | |
| CN106315908B (en) | Deep treatment method and device for cold rolling oily wastewater | |
| CN101816889A (en) | Desulphurization process by combining printing and dyeing wastewater | |
| CN101993173A (en) | Improved alkaline process flow with coking sewage treatment (A/O) method | |
| CN106315722A (en) | Flue gas-stripping sewage-distillation system and resource utilization method thereof | |
| CN100999370A (en) | Treatment method of high alkalinity organic waste water | |
| CN205442935U (en) | Concentrated processing system of waste lye | |
| CN104944497B (en) | Method for treating high-concentration ammonia nitrogen in coal chemical industry wastewater | |
| CN104925890B (en) | A kind of Refinery Wastewater middle and high concentration ammonia nitrogen method | |
| CN203694872U (en) | Organic waste gas recovery system for recycling of nitrogen | |
| CN105439345A (en) | Recycling method for removing lead from acid cleaning waste liquid of lead-containing steel wire ropes | |
| CN206173009U (en) | Device that muddy water mixes, two levels of evaporation processes handles desulfurization waste water | |
| CN112296061A (en) | Harmless treatment method for slag and application of treated slag | |
| CN205528220U (en) | Salt -containing waste water treating device | |
| CN1695774A (en) | Method for eliminating sulfur dioxide in fume | |
| CN106430386A (en) | Clean production industrial zero discharge method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGXI REDWALL NEW MATERIALS CO., LTD. Free format text: FORMER OWNER: GUANGDONG REDWALL NEW MATERIALS CO., LTD. Effective date: 20120511 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 516127 HUIZHOU, GUANGDONG PROVINCE TO: 535000 QINZHOU, GUANGXI ZHUANG AUTONOMOUS REGION |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20120511 Address after: 535000 the Guangxi Zhuang Autonomous Region Real Estate Industrial Park, Qinzhou District, four Applicant after: GUANGXI REDWALL NEW MATERIAL Co.,Ltd. Address before: 516127 Shiwan science and Technology Industrial Park, Boluo, Guangdong, China, Huizhou Applicant before: GUANGDONG REDWALL NEW MATERIALS Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |