CN104707456A - Oxynitride (NOx) waste gas membrane-absorption processing technology - Google Patents
Oxynitride (NOx) waste gas membrane-absorption processing technology Download PDFInfo
- Publication number
- CN104707456A CN104707456A CN201310669836.6A CN201310669836A CN104707456A CN 104707456 A CN104707456 A CN 104707456A CN 201310669836 A CN201310669836 A CN 201310669836A CN 104707456 A CN104707456 A CN 104707456A
- Authority
- CN
- China
- Prior art keywords
- waste gas
- absorbing liquid
- nitrogen oxygen
- nox
- treatment
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to an oxynitride (NOx) waste gas membrane-absorption processing technology, and belongs to the technical field of chemical absorption treatment and membrane separation. In the technology, a hollow fiber membrane contactor is adopted, the diameter/height ratio is 0.1 to 0.3, the diameter of the pores in the membrane is 0.01 to 0.3 [mu]m, and the porosity is 0.1 to 0.6. A cysteine-cobalt (II) absorbing liquid membrane is used to absorb NOx in waste gas and convert the NOx into N2, the absorbing liquid can be recycled after a reduction treatment, and thus the high-efficient treatment of NOx waste gas can be achieved. In the provided technology, the conventional chemical absorbing treatment method and efficient membrane separation technology is combined, the operation conditions are mild, the treatment period is short, the treatment efficiency is high, the absorbing liquid can be used in cycle, and the NOx in waste gas can be processed efficiently.
Description
Technical field
The present invention relates to a kind of nitrogen oxygen waste gas film and absorb treatment technology, belong to chemical absorbing process and film point technical field.
Background technology
NO waste gas is one of primary pollution source of atmosphere pollution.Because NO can form photochemical fog and acid rain, damage the ozone layer, very large harm is caused to environment, therefore extremely urgent to carrying out improvement containing NO waste gas.At present selective catalytic reduction, SNCR, plasma method, absorption method, catalytic decomposition, liquid absorption method and microbial method etc. are mainly contained to the administering method containing NO waste gas.Although these methods respectively have its feature when processing and containing NO waste gas, the shortcomings such as some exists, and cost is high, catalyst easy in inactivation, treatment effect are unstable; NO exhaust gas conversion can be become the waste water containing NO3-N and NO2-N by some administering method, thus causes secondary pollution.Therefore, a kind of efficient nitrogen oxygen exhaust gas treatment technology is developed to effective improvement of nitrogenous oxygen waste gas with control extremely important.
Summary of the invention
The object of this invention is to provide a kind of nitrogen oxygen waste gas film and absorb treatment technology, adopt hollow fiber membrane contactors to realize effective process of nitrogen oxygen waste gas.
Technical scheme of the present invention: a kind of nitrogen oxygen waste gas film absorbs treatment technology, (its blade diameter length ratio is 0.1 ~ 0.3 to adopt hollow fiber membrane contactors, loading density is 0.1 ~ 0.6, membrane micropore aperture is 0.01 ~ 0.3 μm, porosity 0.1 ~ 0.6), adopt cysteine to close sub-cobalt and absorb the nitrogen oxide in liquid film absorption waste gas and it is converted into N
2, reacted absorbing liquid can recycle after reduction treatment, thus realizes effective process of nitrogen oxygen waste gas.
Nitrogen carrier of oxygen imports tube side by the lower end of hollow-fibre membrane, and flow to the other end along tube chamber, its concentration is 100 ~ 1000mg/m
3, induction air flow ratio is 1 × 10
-3~ 5 × 10
-2m/s, tail gas is up to standard rear emptying after testing; Absorbent is driven the shell side being entered hollow fiber membrane contactors by side by peristaltic pump, after flowing out outside hollow-fibre membrane tube chamber, return absorbent storage tank, its concentration is 0.005 ~ 0.2mol/L, and flow velocity is 1 × 10
-3~ 10 × 10
-3m/s, temperature is 20 ~ 80 DEG C, and two-phase also flows or counter-current operation.Nitrogen oxygen waste gas film absorbs the process flow diagram for the treatment of technology as shown in Figure 1.
When reactant liquor assimilation effect is poor or tail gas exceeds standard, in absorbent storage tank, lead to the gas (as sulfur dioxide, hydrogen sulfide) containing reducing substances or add metallic reducing agent (as Zn, Cu etc.), make trivalent cobalt be reduced into divalence cobalt, thus realize recycling of absorbing liquid.Its principle is:
The present invention has following beneficial effect:
1, the present invention combines traditional chemical absorbing processing method and efficient membrane separation technique cleverly, and operating condition is gentle, and treatment cycle is short, and treatment effeciency is high, effectively can remove the nitrogen oxide in waste gas.
2, cysteine of the present invention closes sub-cobalt absorbing liquid and can recycle after reduction treatment, thus realizes effective process of nitrogen oxygen waste gas.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 nitrogen oxygen waste gas film absorbs the process flow diagram for the treatment of technology.1. nitrogen oxygen waste gas; 2 tail gas; 3. peristaltic pump; 4. absorbing liquid; 5 membrane contactors; 6. pressure sensor; 7. temperature sensor; 8. flowmeter
Fig. 2 cysteine closes sub-cobalt absorbing liquid and recycles effect
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Embodiment 1: at gas flow rate 5 × 10
-3m/s, gas concentration 600mg/m
3, absorbing liquid concentration 0.02mol/L, absorbing liquid flow velocity 3 × 10
-3under the condition of m/s, absorbing liquid temperature 50 C, in 60min, the clearance of NO is greater than 99%.
Embodiment 2: after experimental example 1 carries out 60min, in absorbing liquid, pass into concentration is 600mg/m
3/ m
3after sulfur dioxide, absorbing liquid still returns to the clearance of NO and is greater than 99%.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. nitrogen oxygen waste gas film absorbs a processing method, the hollow fiber membrane contactors of employing, and its blade diameter length ratio is 0.1 ~ 0.3, and loading density is 0.1 ~ 0.6, and membrane micropore aperture is 0.1 ~ 0.3 μm, and porosity is 0.1 ~ 0.6; It is characterized in that: step is as follows, (1) adopts absorbing liquid cysteine close the NOx in sub-cobalt film absorption waste gas and it is converted into N
2; (2) reacted absorbing liquid can recycle after reduction treatment, thus realizes the efficient process of nitrogen oxygen waste gas.
2. the film absorption process of nitrogen oxygen waste gas according to claim 1, is characterized in that: the concentration that described absorbing liquid cysteine closes sub-cobalt is 0.005 ~ 0.5mol/L.
3. the film absorption process of nitrogen oxygen waste gas according to claim 1, is characterized in that: the concentration that described absorbing liquid cysteine closes sub-cobalt is 0.02mol/L.
4. the film absorption process of nitrogen oxygen waste gas according to claim 1, is characterized in that: the nitrous oxides concentration of process is at 100 ~ 1000mg/m
3.
5. the film absorption process of nitrogen oxygen waste gas according to claim 1, is characterized in that: reacted absorbing liquid can recycle after utilizing the sulphur dioxide reduction process in waste gas.
6. the film absorption process of nitrogen oxygen waste gas according to claim 1, is characterized in that: reacted absorbing liquid can recycle after utilizing the hydrogen sulfide reduction treatment in waste gas.
7. the film absorption process of nitrogen oxygen waste gas according to claim 1, is characterized in that: can recycle after the reduction treatment of reacted absorbing liquid metallic reducing agent (as Zn, Cu etc.).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310669836.6A CN104707456A (en) | 2013-12-11 | 2013-12-11 | Oxynitride (NOx) waste gas membrane-absorption processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310669836.6A CN104707456A (en) | 2013-12-11 | 2013-12-11 | Oxynitride (NOx) waste gas membrane-absorption processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104707456A true CN104707456A (en) | 2015-06-17 |
Family
ID=53407486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310669836.6A Pending CN104707456A (en) | 2013-12-11 | 2013-12-11 | Oxynitride (NOx) waste gas membrane-absorption processing technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104707456A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237815A (en) * | 2016-08-30 | 2016-12-21 | 西安热工研究院有限公司 | The method that one ethylenediamine cobalt (II)/magnesium-yttrium-transition metal carries out wet flue gas denitration |
| CN106853330A (en) * | 2015-12-09 | 2017-06-16 | 江南大学 | A kind of nitrogen oxygen waste gas film absorbs recycling processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362044A (en) * | 2008-09-08 | 2009-02-11 | 江南大学 | Formaldehyde exhaust-gas efficient film absorption technique |
-
2013
- 2013-12-11 CN CN201310669836.6A patent/CN104707456A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362044A (en) * | 2008-09-08 | 2009-02-11 | 江南大学 | Formaldehyde exhaust-gas efficient film absorption technique |
Non-Patent Citations (1)
| Title |
|---|
| 李鹏等: "《半胱氨酸合钴溶液膜吸收法处理NO废气》", 《化工环保》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106853330A (en) * | 2015-12-09 | 2017-06-16 | 江南大学 | A kind of nitrogen oxygen waste gas film absorbs recycling processing method |
| CN106237815A (en) * | 2016-08-30 | 2016-12-21 | 西安热工研究院有限公司 | The method that one ethylenediamine cobalt (II)/magnesium-yttrium-transition metal carries out wet flue gas denitration |
| CN106237815B (en) * | 2016-08-30 | 2019-01-25 | 西安热工研究院有限公司 | A method of wet flue gas denitration is carried out with ethylenediamine cobalt (II)/magnesium-yttrium-transition metal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103230734B (en) | Combine the method removing sulfur dioxide in flue gas and nitrogen oxide | |
| CN108355483B (en) | Wet denitration system and method based on ozone catalytic oxidation absorption of flue gas | |
| CN101244364B (en) | Negative pressure soda liquor absorption technique for oxides of nitrogen waste gas | |
| CN103363537B (en) | Oxygen-enriched combustion flue gas purification device | |
| CN104028100A (en) | Absorption technology of oxynitride gas at normal pressure and apparatus | |
| CN103421566B (en) | A kind of natural gas deviates from sulfur recovery technology and device | |
| CN105536481A (en) | Circulating spraying type ultraviolet Fenton oxidation organic waste gas treatment system and method | |
| CN205796930U (en) | A kind of bio-absorbable and the device of membrance separation combined treatment VOCs class waste gas | |
| CN104707456A (en) | Oxynitride (NOx) waste gas membrane-absorption processing technology | |
| CN102989302A (en) | Smoke wet oxidation denitration method | |
| CN203316000U (en) | Boiler gas SNCR (selective non-catalytic reduction) denitration device | |
| CN103145244A (en) | Synergistic biological treatment method for washing waste water and amine salt waste liquor produced by capturing CO2 in smoke of coal-fired power plant | |
| CN204824173U (en) | Nitrogen oxide system nitric acid system in flue gas | |
| CN104069737A (en) | Recycling and purifying method of ammonia-containing industrial waste gas | |
| CN205115054U (en) | Utilize nitrogen oxide water to absorb equipment of rare nitric acid of preparation | |
| CN202844873U (en) | Annular nitric oxide waste gas purifier | |
| CN103170232B (en) | A kind of integrating device of wet oxidation denitration | |
| CN204275813U (en) | System for removing nitrogen oxides in air through catalytic oxidation | |
| CN205252843U (en) | Tail gas denitration absorbing device | |
| CN205570054U (en) | Waste gas denitrification facility | |
| CN105271145A (en) | Equipment for preparing dilute nitric acid through nitrogen oxide water body absorption | |
| CN103962001A (en) | Sulfur dioxide desorbing device based on photo-catalytic oxidation | |
| CN101844033A (en) | Method and device for removing NO from coal smoke | |
| CN211246021U (en) | Waste gas treatment device in spandex production process | |
| CN110975604A (en) | System and method for wet denitration of absorbed flue gas based on ozone micro-nano bubbles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150617 |
|
| WD01 | Invention patent application deemed withdrawn after publication |