CN109289491A - A kind of processing method of carbonated tail gas - Google Patents
A kind of processing method of carbonated tail gas Download PDFInfo
- Publication number
- CN109289491A CN109289491A CN201811346773.XA CN201811346773A CN109289491A CN 109289491 A CN109289491 A CN 109289491A CN 201811346773 A CN201811346773 A CN 201811346773A CN 109289491 A CN109289491 A CN 109289491A
- Authority
- CN
- China
- Prior art keywords
- tail gas
- carbonated
- present
- hypochlorite solution
- normal temperature
- 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
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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention provides a kind of processing methods of carbonated tail gas, include the following steps: (1) for carbonated tail gas, are passed through in saturation calcium hypochlorite solution at normal temperature, and the carbon dioxide absorbed in tail gas generates precipitation of calcium carbonate；(2) gained absorbing liquid in collection step (1), absorbing liquid after filtering, obtain and contain hypochlorite solution, and filtering gained contains hypochlorite solution；(3) collection step (1) resulting tail gas, is passed through in NaOH solution at normal temperature, and the tail gas after absorbing can be discharged directly into air.The beneficial effects of the present invention are: the present invention does not generate a large amount of industrial wastewater, greatly reduces the use of wastewater treatment reagent, reduces entreprise cost, while protecting environment.Present invention process process is simple, equipment investment is few, easily operated, and the byproduct also economic value with higher that treatment process generates.Not only enterprise saves processing cost, is also greatly reduced possible environmental pollution.
Description
Technical field
The invention belongs to chemical technology fields, and in particular to a kind of processing method of carbonated tail gas
Background technique
During catalytic oxidation of hydrogen chloride for preparing chlorine gas, usually using alkane chlorination, ethylene oxychlorination, MDI and TDI production
The hydrogen chloride of equal byproduct in process is as raw material, wherein the inorganic matters such as organic matter and carbon monoxide for containing are in chlorination hydrogen catalysis oxygen
It is converted to carbon dioxide during changing, as product chlorine and unconverted hydrogen chloride and oxygen enter product segregative line together
System.
In product separation system, unconverted hydrogen chloride is largely removed by water absorption, and chlorine is chilled big
Partial freeze gets off, remaining oxygen and carbon dioxide gas containing a small amount of chlorine.
In order to improve the utilization rate of oxygen, oxygen and carbon dioxide gas needs of this part containing a small amount of chlorine are returned to
Reaction member, and carbon dioxide is not involved in catalytic oxidation, therefore the carbon dioxide in system will continue to accumulate, and then to urging
Oxidation brings adverse effect, it is therefore desirable to discharge least a portion of recyclegas continuously with the carbon dioxide in guarantee system
Concentration is in technique safe level or less.The gas that chlorine, oxygen and carbon dioxide are contained in this part generallys use NaOH solution
By being discharged after wastewater treatment after absorption.
This method not only increases the consumption of enterprise's NaOH solution, and increases scale wastewater treatment amount and be processed into
This.In view of this, if it is possible to find a kind of method directly handled above-mentioned carbon dioxide containing gas, then both reduce enterprise
The consumption of industry wastewater treatment raw material saves entreprise cost, and can reduce environmental pollution.
Summary of the invention
It is of the existing technology to overcome the purpose of the present invention is to provide a kind of processing method of carbonated tail gas
Defect.
The processing method of carbonated tail gas of the present invention, includes the following steps:
(1) it by carbonated tail gas, is passed through in saturation calcium hypochlorite solution at normal temperature, absorbs the titanium dioxide in tail gas
Carbon generates precipitation of calcium carbonate；
(2) gained absorbing liquid in collection step (1), absorbing liquid after filtering, obtain and contain hypochlorite solution, and filtering gained contains
Hypochlorite solution can be used as bleaching liquid use；
(3) collection step (1) resulting tail gas, is passed through in NaOH solution at normal temperature；
Tail gas after absorbing can be discharged directly into air；Tail gas after the absorption includes such as weight percent
Component: oxygen 55~67%, nitrogen 33%~45%；
Product sale can be made containing liquor natrii hypochloritis in reaction gained after subsequent processing；
In step (1), containing sodium carbonate and the light salt of sodium hypochlorite that the catalytic oxidation of hydrogen chloride for preparing chlorine gas device generates
Water, including following components (mass fraction wt%):
The beneficial effects of the present invention are: exhaust gas of the present invention is absorbed without sodium hydroxide solution, and directly to tail gas into
Row processing, because greatly reducing the use of wastewater treatment reagent, reducing entreprise cost without generating a large amount of industrial wastewater,
Environment is protected simultaneously.Present invention process process is simple, equipment investment is few, easily operated, and the byproduct that treatment process generates
Also economic value with higher.Not only enterprise saves processing cost, is also greatly reduced possible environmental pollution.
Specific embodiment
A specific embodiment of the invention is described in detail below by embodiment.
Embodiment 1
(1) 6052.5kg is added in absorption tower 1 and contains the saturation calcium hypochlorite solution that mass fraction is 17.4%, will contain
Carbon dioxide tail gas (concrete component and content are shown in Table 1) 1293.9kg is passed through 1 bottom of absorption tower at normal temperature, absorbs in tail gas
Carbon dioxide；
(2) 1 bottom absorbing liquid of absorption tower is entered HVM membrane filter to be filtered, obtains and contains hypochlorite solution, gained contains
Hypochlorite solution can be used as bleaching liquid for other production technologies.
The HVM membrane filter is conventional separation equipment, such as Kaimo Filteration Tech's model are as follows:
The equipment of HVM-120-CS/R-TM-B1；
(3) the tail gas 969.9kg after reacted in absorption tower 1 enters from 1 upper outlet of absorption tower and contains mass fraction
In absorption tower 2 for 32% sodium hydroxide solution 504.2kg, tail gas (concrete component and content are shown in Table 1) after absorbing from
2 upper outlet of absorption tower drains into air；Production can be made after subsequent processing containing liquor natrii hypochloritis obtained by 2 lower part of absorption tower
Product are sold；
Table 1 handles exhaust gas composition and content (mass fraction wt%) after preceding and processing
| Sample ID | Oxygen | Chlorine | Nitrogen | Carbon dioxide |
| Tail gas before handling | 38.6% | 11.1% | 25.3% | 25.0% |
| Tail gas after processing | 60.4% | / | 39.6% | / |
It is discharged directly into as it can be seen from table 1 carbonated tail gas is up to standard after method processing of the invention
In air.
Claims (3)
1. a kind of processing method of carbonated tail gas, which comprises the steps of:
(1) it by carbonated tail gas, is passed through in saturation calcium hypochlorite solution at normal temperature, the carbon dioxide absorbed in tail gas is raw
At precipitation of calcium carbonate；
(2) gained absorbing liquid in collection step (1), absorbing liquid after filtering, obtain and contain hypochlorite solution, and filtering gained is containing time chlorine
Acid solution；
(3) collection step (1) resulting tail gas, is passed through in NaOH solution at normal temperature, and the tail gas after absorbing can direct emission
It gets into the air.
2. the method according to claim 1, wherein the tail gas after the absorption includes such as weight percent
Component: oxygen 55~67%, nitrogen 33%~45%.
3. method according to claim 1 or 2, which is characterized in that in step (1), the catalytic oxidation of hydrogen chloride for preparing
The containing sodium carbonate and sodium hypochlorite light salt brine that chlorine device generates, including following components (mass fraction wt%):
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346773.XA CN109289491A (en) | 2018-11-13 | 2018-11-13 | A kind of processing method of carbonated tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811346773.XA CN109289491A (en) | 2018-11-13 | 2018-11-13 | A kind of processing method of carbonated tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109289491A true CN109289491A (en) | 2019-02-01 |
Family
ID=65145807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811346773.XA Pending CN109289491A (en) | 2018-11-13 | 2018-11-13 | A kind of processing method of carbonated tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109289491A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104383811A (en) * | 2014-11-17 | 2015-03-04 | 南京朗洁环保科技有限公司 | Method for removing carbon dioxide by semidry method based on straw ash |
| CN104771979A (en) * | 2014-01-13 | 2015-07-15 | 陈富贵 | pm2.5 particle treatment method |
| CN105727724A (en) * | 2016-04-18 | 2016-07-06 | 江苏大学 | Method and device for achieving simultaneous desulfurization, denitrification, demercuration and decarburization through optical radiation on sodium hypochlorite |
| JP2018134604A (en) * | 2017-02-23 | 2018-08-30 | 川崎重工業株式会社 | Carbon dioxide separation recovery system |
| CN108499339A (en) * | 2017-02-27 | 2018-09-07 | 上海泾恬环保科技有限公司 | A variety of waste gas treatment process |
-
2018
- 2018-11-13 CN CN201811346773.XA patent/CN109289491A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104771979A (en) * | 2014-01-13 | 2015-07-15 | 陈富贵 | pm2.5 particle treatment method |
| CN104383811A (en) * | 2014-11-17 | 2015-03-04 | 南京朗洁环保科技有限公司 | Method for removing carbon dioxide by semidry method based on straw ash |
| CN105727724A (en) * | 2016-04-18 | 2016-07-06 | 江苏大学 | Method and device for achieving simultaneous desulfurization, denitrification, demercuration and decarburization through optical radiation on sodium hypochlorite |
| JP2018134604A (en) * | 2017-02-23 | 2018-08-30 | 川崎重工業株式会社 | Carbon dioxide separation recovery system |
| CN108499339A (en) * | 2017-02-27 | 2018-09-07 | 上海泾恬环保科技有限公司 | A variety of waste gas treatment process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4641691B2 (en) | Method for decomposing organic compounds in water | |
| CN102633398A (en) | Method for recovering organic effluent brine | |
| CN104258690B (en) | The method that hydrochloric acid tail gas absorption produces byproduct hydrochloric acid in production processes of chloroacetic acid | |
| CN101143753A (en) | Deep treatment method for waste salt water produced in MDI producing process | |
| CN102503016A (en) | Device and method for treating ammonia nitrogen wastewater, recycling ammonia and preparing ammonium sulfate | |
| US20130336870A1 (en) | Advanced Tritium System for Separation of Tritium from Radioactive Wastes and Reactor Water in Light Water Systems | |
| CN100494097C (en) | Method for treating wastewater from production of chlorated fulminuric acid | |
| CN105645634B (en) | A kind of processing method of epoxy resin synthetic wastewater | |
| RU2509829C2 (en) | Method of producing chlorine, caustic soda and hydrogen | |
| CN105036425B (en) | The recycling processing method of salt-containing organic wastewater | |
| CN106591873A (en) | Treating and recycling method of sodium hypochlorite-containing waste liquid | |
| CN202415315U (en) | Device for treating ammonia nitrogen waste water, recovering ammonia and preparing ammonium sulfate | |
| CN102491565B (en) | Method for recovering waste water from sodium dichloroisocyanurate production | |
| CN1060138C (en) | Method for preparing high-purity high-concentration and stable chlorine dioxide | |
| CN109289491A (en) | A kind of processing method of carbonated tail gas | |
| CN210814688U (en) | Tail gas treatment system in sulfuric acid preparation process | |
| CN106316778B (en) | Deimpurity method is gone in a kind of production of perfluoropropene | |
| CN211799976U (en) | Hydrogen chloride synthesis tail gas purification resource recycling device | |
| CN105084328A (en) | Method for producing ammonium sulfamate by utilization of exhaust gas containing ammonia and carbon dioxide | |
| CN102259992A (en) | Method for rapidly removing ammonium by liquid-phase oxidation of brine | |
| CN209957454U (en) | Pure oxygen circulation system ozone sewage treatment device | |
| CN106621867A (en) | A preparing method of a urea solution used for vehicles | |
| CN107585903B (en) | Method for treating and recycling dilute brine containing sodium carbonate and sodium hypochlorite | |
| CN208265798U (en) | Taurine wastewater zero discharge processing unit | |
| CN105174583B (en) | A kind of recycling processing method of diluted alkaline waste water |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190201 |
|
| WD01 | Invention patent application deemed withdrawn after publication |