CN106552474A - The recovery method of dichloromethane in waste gas - Google Patents
The recovery method of dichloromethane in waste gas Download PDFInfo
- Publication number
- CN106552474A CN106552474A CN201611003175.3A CN201611003175A CN106552474A CN 106552474 A CN106552474 A CN 106552474A CN 201611003175 A CN201611003175 A CN 201611003175A CN 106552474 A CN106552474 A CN 106552474A
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- CN
- China
- Prior art keywords
- dichloromethane
- waste gas
- recovery method
- condensation
- molecular sieve
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- 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.)
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- 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
- B01D53/002—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 condensation
-
- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/389—Separation; Purification; Stabilisation; Use of additives by adsorption on solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
- B01D2253/1085—Zeolites characterized by a silicon-aluminium ratio
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/206—Organic halogen compounds
- B01D2257/2064—Chlorine
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses in waste gas dichloromethane recovery method, comprise the following steps：Step one, by discharge the waste gas containing dichloromethane condensed；Step 2, by condensation separation after the waste gas containing dichloromethane enter molecular sieve adsorber；Step 3, it is passed through vapor in molecular sieve, desorbs dichloromethane；Step 4, by the dichloromethane for desorbing and vapor mixing aqueous vapor thing Jing three-levels condensers condensation, obtain the mixture of dichloromethane and water, Jing static layering obtains dichloromethane.Integrated artistic of the present invention is simple, facilitates implementation, and using when can lift the organic efficiency of dichloromethane.
Description
Technical field
The present invention relates in waste gas recovery technology, specifically waste gas dichloromethane recovery method.
Background technology
Dichloromethane is non-flammable low boiling point solvent, and purposes is quite varied due to its low boiling point, in the industrial production very
It is readily volatilized, cause the recovery method that environmental pollution and raw material are lost dichloromethane in existing waste gas mainly to have condensation method
Solvent absorption active carbon adsorption condensation-solvent absorption condensation method is by below waste gas condensation to dichloromethane boiling point
Or it is lower, recycling design absorption process is with high compared with dichloromethane boiling point molten in addition to make dichloromethane condense into liquid by gaseous state
Agent is absorbing the dichloromethane in waste gas, then to separate dichloromethane and solvent activity carbon adsorption by the method distilled be to use
The absorption property of activated carbon adsorbing the dichloromethane in waste gas, then by desorbing reclaiming the suction of dichloromethane condensation-solvent
Receipts method is the group technology of condensation method and solvent absorption.During said method application, organic efficiency is relatively low, how to lift dichloro
The organic efficiency of methane, this becomes current people's question of common concern, but corresponding technique no now, also have no related
Report.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided the recovery method of dichloromethane in waste gas, its
Using when can lift the organic efficiency of dichloromethane.
The present invention solves the above problems and is achieved through the following technical solutions：The recovery method of dichloromethane in waste gas,
Comprise the following steps：
Step one, by discharge the waste gas containing dichloromethane condensed；
Step 2, by condensation separation after the waste gas containing dichloromethane enter molecular sieve adsorber；
Step 3, it is passed through vapor in molecular sieve, desorbs dichloromethane；
Step 4, by the dichloromethane for desorbing and vapor mixing aqueous vapor thing Jing three-levels condensers condensation, obtain dichloromethane
With the mixture of water, Jing static layering obtains dichloromethane.
Further, in the step one, condensation temperature is 5～10 DEG C, and condensation temperature is 0～-20 DEG C.
Further, the condensator outlet for condensing in the step one has the cold well separator with catcher, for reclaiming
Condensation and separation of dichloromethane.
Further, in the step 2 molecular sieve adsorber adsorption temp be -20～30 DEG C, adsorptive pressure be 0～
0.1MPa
Further, 60～120 DEG C of desorption temperature in the step 3, desorption pressures are normal pressure.
Further, in the step 4, static layering automatically controls layering using level meters
In sum, the invention has the advantages that：Multi-stage condensing-molecular sieve adsorption-water is adopted when the present invention is applied
The group technology that steam desorbing-condensation is reclaimed, integrated artistic step are simple, facilitate implementation, low cost, by dichloromethane
Substep is reclaimed, and can lift the organic efficiency of dichloromethane, easy to utilize.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment, to present invention work
Further detailed description, the exemplary embodiment of the present invention and its explanation are only used for explaining the present invention, are not intended as to originally
The restriction of invention.
Embodiment：
Following steps are specifically included during the present embodiment application：
Condensation：Waste gas Jing pipelines send into condenser, waste gas is cooled to 5 DEG C, makes gaseous dichloromethane fractions be condensed into liquid,
Cold wells of the Jing with catcher isolates dichloromethane, and now, the dichloromethane response rate is 50%.
Absorption：The waste gas isolated from Leng Jing enters molecular sieve adsorber, and waste gas passes through molecular sieve from down to up, in waste gas
Dichloromethane normal pressure under by molecular sieve adsorption.
Desorbing：Enter 105 DEG C of vapor desorbing from molecular sieve adsorber top, desorbing air-water mixture, Jing are discharged in bottom
Air-water mixture is condensed to 5 DEG C by three-level condenser, and condensed fluid and gas enter standing separation device.After the completion of desorbing, then from
One molecular sieve adsorber top is entered cold air and adsorber is cooled to 20 DEG C.
Standing separation：Water and dichloromethane mixed liquor in standing separation device, because dichloromethane density ratio water greatly and not
Water being dissolved in, under the control of level meters, dichloromethane being discharged from standing separation device bottom, water is discharged on top, and gas is from standing point
The condensed rear discharge at the top of device.
During the present embodiment application, the absorption phase dichloromethane response rate 28%, overall recovery 95%.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, the be should be understood that specific embodiment that the foregoing is only the present invention is not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (5)
1. in waste gas dichloromethane recovery method, it is characterised in that comprise the following steps：
Step one, by discharge the waste gas containing dichloromethane condensed；
Step 2, by condensation separation after the waste gas containing dichloromethane enter molecular sieve adsorber；
Step 3, it is passed through vapor in molecular sieve, desorbs dichloromethane；
Step 4, by the dichloromethane for desorbing and vapor mixing aqueous vapor thing Jing three-levels condensers condensation, obtain dichloromethane
With the mixture of water, Jing static layering obtains dichloromethane.
2. in waste gas according to claim 1 dichloromethane recovery method, it is characterised in that in the step one condense
Temperature is 5～10 DEG C.
3. in waste gas according to claim 1 dichloromethane recovery method, it is characterised in that in the step one condense
Condensator outlet have the cold well separator with catcher, for reclaim condensation and separation of dichloromethane.
4. in waste gas according to claim 1 dichloromethane recovery method, it is characterised in that molecule in the step 2
The adsorption temp of sieve adsorber is -20～30 DEG C, and adsorptive pressure is 0～0.1MPa
The recovery method of dichloromethane in waste gas according to claim 1, it is characterised in that desorbing temperature in the step 3
60～120 DEG C of degree, desorption pressures are normal pressure.
5. in waste gas according to claim 1 dichloromethane recovery method, it is characterised in that it is static in the step 4
Layering automatically controls layering using level meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003175.3A CN106552474A (en) | 2016-11-15 | 2016-11-15 | The recovery method of dichloromethane in waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611003175.3A CN106552474A (en) | 2016-11-15 | 2016-11-15 | The recovery method of dichloromethane in waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106552474A true CN106552474A (en) | 2017-04-05 |
Family
ID=58444304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611003175.3A Withdrawn CN106552474A (en) | 2016-11-15 | 2016-11-15 | The recovery method of dichloromethane in waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106552474A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902612A (en) * | 2017-04-20 | 2017-06-30 | 成都亨通兆业精密机械有限公司 | A kind of technique that dichloromethane is separated in the terminal from oil-gas transportation |
| CN106966858A (en) * | 2017-04-20 | 2017-07-21 | 成都亨通兆业精密机械有限公司 | A kind of technique for being used in Oil/gas Well waste gas separate dichloromethane |
-
2016
- 2016-11-15 CN CN201611003175.3A patent/CN106552474A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106902612A (en) * | 2017-04-20 | 2017-06-30 | 成都亨通兆业精密机械有限公司 | A kind of technique that dichloromethane is separated in the terminal from oil-gas transportation |
| CN106966858A (en) * | 2017-04-20 | 2017-07-21 | 成都亨通兆业精密机械有限公司 | A kind of technique for being used in Oil/gas Well waste gas separate dichloromethane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170405 |