CN108033878A - Recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying - Google Patents
Recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying Download PDFInfo
- Publication number
- CN108033878A CN108033878A CN201711110048.8A CN201711110048A CN108033878A CN 108033878 A CN108033878 A CN 108033878A CN 201711110048 A CN201711110048 A CN 201711110048A CN 108033878 A CN108033878 A CN 108033878A
- Authority
- CN
- China
- Prior art keywords
- acetaldehyde
- tower
- sewage
- dilute
- absorption
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/783—Separation; Purification; Stabilisation; Use of additives by gas-liquid treatment, e.g. by gas-liquid absorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying, including in acetaldehyde production technique the step of recovery tower recovery section alcohol, and the acetaldehyde raffinate sewage containing acetaldehyde, alcohol and other impurities in recovery tower is pumped into sewage plant processing step, it is characterised in that comprise the following steps：By acetaldehyde raffinate sewage of the temperature that recovery tower is separated at 100 DEG C, by the residual night of 55% -60% in its total amount, residual night temperature is dropped to 16 DEG C by by-pass filtration, circulating water, freezing water cooling, then plus soft water mixes, it is pumped to secondary filter and filters laggard two absorption tower, with the aldehydes gas spray-absorption risen in two absorption towers, 12% dilute acetaldehyde is formed in tower to dilute acetaldehyde groove.The advantage of the invention is that：Acetaldehyde raffinate sewage load is greatly decreased, solves the pressure of environmental protection treatment sewage, while ethanol raw material can also be recycled, reduces production cost, reduces influence of the Chemical Manufacture to environment.
Description
Technical field
The present invention relates to the process of oxidation of ethanol method production acetaldehyde, recovery tower after more particularly to wherein dilute acetaldehyde rectifying
Sewage water treatment method.
Technical background
Acetaldehyde production is raw material alcohol and recovered alcohol（Or water）Evaporator is transported to after matching into 85%--88%, utilizes steaming
Alcohol heating of the vapour to 85---88% in evaporator, air bubbling takes away alcohol gas formation binary gas and enters superheater, defeated
Material steam of providing and delivering forms ternary gas with binary gas in superheater, and ternary gas enter oxidator inner reaction temperature
Aoxidized under the conditions of 545-585 DEG C, dehydrogenation reaction, oxidator export the acetaldehyde mixed gas temperature to be formed for 175-
195 DEG C, pass through recirculated water in oxidator outlet, chilled water two-stage cooler cools to acetaldehyde mixed gas, cooled
Aldehydes gas is sent into main absorption tower and two suction towers, by tower top plus soft water with rising aldehydes gas spray-absorption, is inhaled two in towers
More than 12% dilute acetaldehyde is formed to dilute acetaldehyde groove.With it is dilute pump by dilute acetaldehyde in dilute acetaldehyde groove it is preheated after enter Ethanal distillation column,
Rectifying column is separated into the dense acetaldehyde that concentration is more than 99.2% and enters dense acetaldehyde groove, and in addition raffinate that rectifying column is isolated enters back
Tower is received, recovery tower recovery section ethanol enters recycling vinasse.In addition the acetaldehyde raffinate of a small amount of acetaldehyde, alcohol and other impurities is contained
Sewage, is sent to sewage plant by acetaldehyde raffinate sewage with pump and handles.So often produce one ton of dense acetaldehyde and just produce 12--14 tons or so
Acetaldehyde raffinate sewage of the COD value in 5000--5500 or so.
The content of the invention
The purpose of the present invention is exactly in order to which the sewage quantity for solving the problems, such as to produce in acetaldehyde production is larger, there is provided it is a kind of dilute
Recovery tower sewage water treatment method after acetaldehyde rectifying.
Present invention employs following technical solution：
After a kind of dilute acetaldehyde rectifying in recovery tower sewage water treatment method, including acetaldehyde production technique recovery tower recovery section alcohol into
Enter the step of recycling vinasse, and the acetaldehyde raffinate sewage containing acetaldehyde, alcohol and other impurities is pumped into sewage plant processing
Step, it is characterised in that comprise the following steps：
By acetaldehyde raffinate sewage of the temperature that recovery tower is separated at 100 DEG C, by by-pass filtration, circulating water, freezing
Residual night temperature is dropped to 16 DEG C by water cooling, and then plus soft water mixes, and is pumped to secondary filter and filters laggard two absorption tower, with two
The aldehydes gas spray-absorption risen in absorption tower, forms 12% dilute acetaldehyde to dilute acetaldehyde groove in tower.
Based on the above technical solutions, further scheme is：By the temperature that recovery tower is separated at 100 DEG C
Acetaldehyde raffinate sewage, by the residual night of 55% -60% in its total amount, by by-pass filtration, circulating water, freezes water cooling handle
Then plus soft water mixing residual night temperature drops to 16 DEG C, is pumped to secondary filter and filters laggard two absorption tower, and in two absorption towers
The aldehydes gas spray-absorption of rising, forms 12% dilute acetaldehyde to dilute acetaldehyde groove in tower.
The tail gas of two suction towers discharges is sent to tail gas absorber, can using circulating pump by absorbing liquid cyclic absorption tail gas
Absorption forms the dilute acetaldehyde of 2-5%, send in the lump to dilute acetaldehyde groove.
The advantage of the invention is that：Acetaldehyde raffinate sewage load is greatly decreased, solves the pressure of environmental protection treatment sewage, together
When can also recycle ethanol raw material, reduce production cost, reduce influence of the Chemical Manufacture to environment.
Brief description of the drawings：
Fig. 1 is the process flow chart of the present invention.
Embodiment：
Referring to Fig. 1 flow charts, recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying provided by the invention, including existing work
Skill step：Acetaldehyde production is raw material alcohol and recovered alcohol（Or water）Evaporator is transported to after matching into 85%--88%, utilizes steaming
Alcohol heating of the vapour to 85---88% in evaporator, air bubbling takes away alcohol gas formation binary gas and enters superheater, defeated
Material steam of providing and delivering forms ternary gas with binary gas in superheater, and ternary gas enter oxidator inner reaction temperature
Aoxidized under the conditions of 545-585 DEG C, dehydrogenation reaction, oxidator export the acetaldehyde mixed gas temperature to be formed for 175-
195 DEG C, pass through recirculated water in oxidator outlet, chilled water two-stage cooler cools to acetaldehyde mixed gas, cooled
Aldehydes gas is sent into main absorption tower and two suction towers, by tower top plus soft water with rising aldehydes gas spray-absorption, is inhaled two in towers
More than 12% dilute acetaldehyde is formed to dilute acetaldehyde groove.With it is dilute pump by dilute acetaldehyde in dilute acetaldehyde groove it is preheated after enter Ethanal distillation column,
Rectifying column is separated into the dense acetaldehyde that concentration is more than 99.2% and enters dense acetaldehyde groove, and in addition raffinate that rectifying column is isolated enters back
Tower is received, recovery tower recovery section ethanol enters recycling vinasse.In addition the acetaldehyde raffinate of a small amount of acetaldehyde, alcohol and other impurities is contained
Sewage, is sent to sewage plant by acetaldehyde raffinate sewage with pump and handles.
The characterization step of the present invention is：
By acetaldehyde raffinate sewage of the temperature that recovery tower is separated at 100 DEG C or so（Recycle-water）, by 55--60%'s therein
Residual night amount, is filtered by grade one filter, is then changed by two steps, is freezed water cooler recycling coolant-temperature gage is dropped to 16 DEG C,
Add soft water to mix, be pumped to secondary filter and filter laggard two absorption tower, spray and inhale with the aldehydes gas risen in two absorption towers
Receive, 12% dilute acetaldehyde is formed in tower and collects dilute acetaldehyde groove.
In addition, the tail gas of two suction towers discharges is sent to tail gas absorber, using circulating pump by absorbing liquid cyclic absorption tail gas,
It can absorb to form the dilute acetaldehyde of 2-5%, send in the lump to dilute acetaldehyde groove.
So often produce one ton of dense acetaldehyde and just produce 6 tons of acetaldehyde raffinate sewage less, acetaldehyde 6000 is produced by this covering device year
Ton, reduces produce 3.6 ten thousand tons of sewage altogether, solve the pressure of environmental protection treatment sewage, reduce production cost, reduces Chemical Manufacture to ring
The influence in border.
Claims (3)
- A kind of 1. recovery tower recovery section alcohol in recovery tower sewage water treatment method, including acetaldehyde production technique after dilute acetaldehyde rectifying The step of, and the acetaldehyde raffinate sewage containing acetaldehyde, alcohol and other impurities in recovery tower is pumped into sewage plant processing step Suddenly, it is characterised in that comprise the following steps：By acetaldehyde raffinate sewage of the temperature that recovery tower is separated at 100 DEG C, by by-pass filtration, circulating water, freezing Residual night temperature is dropped to 16 DEG C by water cooling, and then plus soft water mixes, and is pumped to secondary filter and filters laggard two absorption tower, with two The aldehydes gas spray-absorption risen in absorption tower, forms 12% dilute acetaldehyde to dilute acetaldehyde groove in tower.
- 2. recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying according to claim 1, it is characterised in that：Will recycling Acetaldehyde raffinate sewage of the temperature that tower is separated at 100 DEG C, by the residual night of 55% -60% in its total amount, by level-one mistake Residual night temperature is dropped to 16 DEG C by filter, circulating water, freezing water cooling, and then plus soft water mixes, and is pumped to secondary filter mistake Laggard two absorption tower is filtered, with the aldehydes gas spray-absorption risen in two absorption towers, 12% dilute acetaldehyde is formed in tower to dilute acetaldehyde Groove.
- 3. recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying according to claim 2, it is characterised in that：Two are inhaled The tail gas of tower discharge is sent to tail gas absorber, using circulating pump by absorbing liquid cyclic absorption tail gas, can absorb that to form 2-5% dilute Acetaldehyde, send to dilute acetaldehyde groove in the lump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711110048.8A CN108033878A (en) | 2017-11-12 | 2017-11-12 | Recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711110048.8A CN108033878A (en) | 2017-11-12 | 2017-11-12 | Recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108033878A true CN108033878A (en) | 2018-05-15 |
Family
ID=62093953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711110048.8A Pending CN108033878A (en) | 2017-11-12 | 2017-11-12 | Recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108033878A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519941A (en) * | 2018-12-10 | 2019-03-26 | 安徽金禾实业股份有限公司 | A kind of acetaldehyde tail gas from absorption tower comprehensive recovering process |
| CN110721554A (en) * | 2019-11-19 | 2020-01-24 | 安徽金禾实业股份有限公司 | Comprehensive utilization method for pentaerythritol production wastewater and formaldehyde acetaldehyde |
| CN114031482A (en) * | 2021-05-19 | 2022-02-11 | 黎明化工研究设计院有限责任公司 | Method for reducing acetaldehyde content in alcohol recovered by hydroxyl-terminated polybutadiene production process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106349043A (en) * | 2016-08-30 | 2017-01-25 | 安徽金禾实业股份有限公司 | Attenuant acetaldehyde rectification residual liquor recycling method |
-
2017
- 2017-11-12 CN CN201711110048.8A patent/CN108033878A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106349043A (en) * | 2016-08-30 | 2017-01-25 | 安徽金禾实业股份有限公司 | Attenuant acetaldehyde rectification residual liquor recycling method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109519941A (en) * | 2018-12-10 | 2019-03-26 | 安徽金禾实业股份有限公司 | A kind of acetaldehyde tail gas from absorption tower comprehensive recovering process |
| CN110721554A (en) * | 2019-11-19 | 2020-01-24 | 安徽金禾实业股份有限公司 | Comprehensive utilization method for pentaerythritol production wastewater and formaldehyde acetaldehyde |
| CN110721554B (en) * | 2019-11-19 | 2022-03-29 | 安徽金禾实业股份有限公司 | Comprehensive utilization method for pentaerythritol production wastewater and formaldehyde acetaldehyde |
| CN114031482A (en) * | 2021-05-19 | 2022-02-11 | 黎明化工研究设计院有限责任公司 | Method for reducing acetaldehyde content in alcohol recovered by hydroxyl-terminated polybutadiene production process |
| CN114031482B (en) * | 2021-05-19 | 2023-05-05 | 黎明化工研究设计院有限责任公司 | Method for reducing acetaldehyde content in alcohol recovered by hydroxyl-terminated polybutadiene production process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108033878A (en) | Recovery tower sewage water treatment method after a kind of dilute acetaldehyde rectifying | |
| CN103964382A (en) | Bittern bromine-blowing process | |
| CN205774212U (en) | The device of removing impurities matter butylcyclohexyl ether in process of cyclohexanone production | |
| CN111807981A (en) | Method for recovering DMF (dimethyl formamide) from trichloroethane | |
| CN102826956B (en) | Method for separating methyl propionate-methanol-water system by integration of salt-effect extraction and rectification | |
| CN106349043B (en) | A kind of dilute acetaldehyde distillation residual liquid recycling application method | |
| CN107512810A (en) | Method of wastewater treatment after a kind of nitro-chlorobenzene production | |
| CN104130105B (en) | The method that in D-4-methylsulfonylphserine serine ethyl ester production, ethanol is recycled | |
| CN109319736B (en) | Ammonia tank purge gas recovery device and process thereof | |
| CN108314617B (en) | Method and device for recovering acetaldehyde in pentaerythritol production | |
| CN102649545B (en) | Nitric acid pre-concentration method for waste acid concentration technology in production of dinitrotoluene | |
| CN110330418B (en) | Method for recovering formaldehyde gas volatilized in normal pressure device in pentaerythritol production | |
| CN108358763B (en) | Alkyl ester method glyphosate solvent recovery system and process based on three-stage condensation | |
| CN106365178A (en) | Method for purification of hydrocyanic acid | |
| CN217187959U (en) | Tetrahydrofuran recycling and refining device | |
| CN114436293B (en) | Method for directly producing sodium bromide from low-concentration brine | |
| CN214830035U (en) | Optimized separation system for maleic anhydride direct hydrogenation reaction product | |
| CN102452925B (en) | Method for separating acetic acid from water | |
| CN106744720B (en) | The circulation recycling system and its operation process of trichloroacetaldehyde by-product dilute sulfuric acid | |
| CN110963890B (en) | Refining method of gaseous methanol | |
| CN102992951A (en) | Method for preparing high-purity refined methanol by three-tower rectification | |
| CN103663398B (en) | Method and device for utilizing heat energy of diammonium phosphate neutralization tail gas | |
| CN108217615B (en) | Device for removing nitrotoluene from dilute nitric acid after nitrotoluene waste acid denitration | |
| CN106631744A (en) | Method for coupling and separating water-acetone-isopropyl ether based on extraction-variable pressure rectification | |
| CN107459449A (en) | A kind of acetic acid is separated from water method |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180515 |
|
| RJ01 | Rejection of invention patent application after publication |