CN107512751A - A kind of concentration technology of cyclohexanone saponification waste lye - Google Patents
A kind of concentration technology of cyclohexanone saponification waste lye Download PDFInfo
- Publication number
- CN107512751A CN107512751A CN201610439353.0A CN201610439353A CN107512751A CN 107512751 A CN107512751 A CN 107512751A CN 201610439353 A CN201610439353 A CN 201610439353A CN 107512751 A CN107512751 A CN 107512751A
- Authority
- CN
- China
- Prior art keywords
- salkali waste
- evaporating column
- lye
- compressor
- saponification
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
Abstract
The invention discloses a kind of concentration technology of cyclohexanone saponification waste lye, cyclohexanone saponification waste lye evaporation gas phase is compressed using compressor, as the thermal source of cyclohexanone saponification waste lye concentration, the consumption of steam during so as to which concentration is greatly reduced.Energy consumption of the invention is low, good economy performance, is not in foaming and crystallization.
Description
Technical field
The invention belongs to cyclohexanone saponification waste lye process field, and in particular to a kind of concentration work of cyclohexanone saponification waste lye
Skill.
Background technology
Cyclohexanol and cyclohexanone are prepared, typically with the gas oxidizing ethyle alkyl of molecule-containing keto, firstly generates peroxide containing cyclohexyl
Change the oxidation mixture (being commonly called as cyclohexane oxide solution) of hydrogen, cyclohexanol and cyclohexanone, then with 30% sodium hydroxide liquid caustic soda
This oxidation mixture is handled, cyclohexyl hydroperoxide therein is decomposed generation cyclohexanol and cyclohexanone.Due in cyclohexyl
Liquid caustic soda is introduced in hydrogen peroxide decomposable process, thus the saponification waste lye of high COD concentration can be produced, every about 1 ton of ring of production
Hexanone can produce 0.8 ton of saponification waste lye.This saponification waste lye is because COD concentration is high, pH value reaches 10-14 and comparison is difficult
Processing, if directly discharging, it will cause serious environmental pollution.
Current cyclohexanone saponification waste lye handling process is burning method at present, if the solid contents in saponification waste lye is too
If low, fuel is on the one hand consumed more, incinerator flame on the other hand can be caused unstable, flame-out risk be present.So soap
Changing before spent lye enters incinerator needs to carry out concentration.The concentration of common saponification waste lye is to take steam distillation shape in industry
Formula, 1 ton of steam will be consumed by often steaming 1 ton of water, even if using double-effect evaporation, 0.6 ton of steam will be consumed by often steaming 1 ton of water.
And due in the saponification waste lye in addition to containing sodium hydroxide, sodium carbonate, it is also existing containing a certain amount of carboxylic acid sodium, use
Method for concentration is easy to make whole thing system bubble, plus easily crystallization again after concentration, when solid content has been begun to up to 45% or so
Crystallization separates out and grain diameter is larger, easy blocking pipeline, is not easy to concentrate the technique conveying of spent lye, influences the length of device
Periodic duty, therefore, cyclohexanone saponification waste lye condensing mode and power saving, which seem, to become more and more important.
The content of the invention
The invention aims to solve high energy consumption, foaming and Crystallization Plugging pipeline in cyclohexanone saponification waste lye concentration process
The problem of, and propose that a kind of energy consumption is low, good economy performance, be not in the cyclohexanone saponification waste lye of foaming and pipe plugging by crystallization
Concentration technology.
Problem solved by the invention can be realized using following technical scheme：
A kind of concentration technology of cyclohexanone saponification waste lye, the saponification waste lye after oxidizing cyclohexanone decomposition process enter useless
Alkali evaporating column, gained evaporation gas phase enters pressure after salkali waste evaporates the foam removal of column overhead demister and cyclone hydraulic separators separation after evaporation
Contracting machine compresses, and gained compression gas phase exchanges heat with the saponification waste lye of evaporator shell side and tube side after compression, compression gas phase cooling
Liquid phase afterwards is discharged into water treatment system as lime set, the water in saponification waste lye vaporized after being heated obtained water evaporation gas phase from
The tower top discharge of salkali waste evaporating column.
The present invention further comprises following preferable technical scheme：
In preferable scheme, ultrasonic cleaner is set in salkali waste evaporating column tower reactor and pump inlet pipeline.Utilize ultrasound
The percussion of ripple, crystallization is set not form large-sized particle.
By above-mentioned setting, cyclohexanone saponification waste lye does not have large particle crystal precipitation and blocked after can further making concentration
Pipeline.
In preferable scheme, the salkali waste evaporating column tower reactor liquid phase uses circulating pump forced circulation between evaporator and tower reactor.
In preferable scheme, the salkali waste evaporating column is tower structure, and demister is arranged on salkali waste evaporating column top, the rotation
Liquid/gas separator is arranged on top gaseous phase pipeline, for carrying out gas-liquid phase separation.
In preferable scheme, compressor used is that compression ratio is less than 2.
In preferable scheme, compressor used is one kind in lobed rotor compressor, centrifugal compressor or air blower.
In preferable scheme, the salkali waste evaporation column overhead temperatures are 95-100 DEG C.
In preferable scheme, the salkali waste evaporating column bottom temperature is 95-105 DEG C.
In preferable scheme, the compressor exit temperature is 105-115 DEG C.
In preferable scheme, water evaporation gas phase is from the saponification waste lye after remaining concentration after the tower top discharge of salkali waste evaporating column
In, solids content 50-60%.
Present invention contrast prior art has following progressive：
1st, the thermal efficiency is high, it is low to save the energy, unit work consumptiom.Evaporation 1 ton of water energy consumption be converted to mark coal be only equivalent to tradition it is general
/ 10 to ten/9ths of logical evaporation, energy-saving effect is notable.
2nd, clean environment firendly, new pollution is not produced.
3rd, it is suitable for easy to foaming, easy crystallizing system.
4th, in the saponification waste lye after concentrating, solids content is high, is easy to further carry out subsequent treatment.
Although compressor compresses are a kind of compress modes more conventional in mechanical field, use it for concentrating cyclohexanone saponification
Spent lye is very difficult to expect, during inventor is engaged in research and development throughout the year, not yet someone carries out this kind of trial, because
It is too wide in the gap for field.And inventor is had found by the way that compressor is used for into cyclohexanone saponification salkali waste in once accidental trial
When in liquor treating process, discovery can obtain the unexpected effect got twice the result with half the effort.And inventor is complete in order to obtain one
, handling process achievable, effect is good, continuous improvement has been carried out to technical process, has not only obtained various heats
Effective recycling, has saved resource, and solve and easily go out in conventional cyclohexanone saponification waste lye handling process
Existing easy to foaming, the problems such as easily crystallizing.The present invention each process seem simple, actually its combine be very cleverly,
Also solve the problems, such as long-standing problem technical staff, consume the substantial amounts of energy of inventor, by small-scale practical application,
It was found that it has very strong practicality, huge economic benefit can be brought.
Brief description of the drawings
Fig. 1 is the schematic diagram of the process chart of the present invention.
Wherein：1- cyclone hydraulic separators, 2- salkali waste evaporating columns, 3- lobed rotor compressors, 4- evaporators, 5- circulating pumps
Embodiment
The present invention will be further described with reference to the accompanying drawings and examples, but the present invention is not limited to following embodiments.
Embodiment 1
10t/h cyclohexanone saponification waste lye (solids content 30%) enters salkali waste evaporating column 2 by pressure difference,
Evaporated in salkali waste evaporating column 2,95-100 DEG C of evaporation gas phase passes through the rotary filter press of cyclone hydraulic separators 1, and then gas phase enters sieve
Recompressed in thatch compressor 3, the exit gas phase temperature of lobed rotor compressor 3 is 105-115 DEG C, and compression gas phase is re-used as thermal source
Carry out cyclohexanone saponification waste lye in heating evaporation salkali waste evaporating column 2, compression gas phase is condensed into liquid in circulating pump 4.
The amount of liquid discharged from cyclone hydraulic separators 1 and circulating pump 4 is 4t/h, and the power consumption of lobed rotor compressor 3 is 350Kw/h,
The solids content of cyclohexanone saponification waste lye after concentration is 50%.
The embodiment of the present invention is described above in association with accompanying drawing, but these explanations can not be considered as limiting this
The scope of invention, protection scope of the present invention are limited by appended claims, any on the basis of the claims
Change is all protection scope of the present invention.
Claims (10)
- A kind of 1. concentration technology of cyclohexanone saponification waste lye, it is characterised in that the saponification after oxidizing cyclohexanone decomposition process Spent lye enters salkali waste evaporating column, and gained evaporation gas phase evaporates the foam removal of column overhead demister through salkali waste after evaporation and cyclone hydraulic separators separates Enter compressor compresses afterwards, gained compression gas phase exchanges heat with the saponification waste lye of evaporator shell side and tube side after compression, compresses gas phase Liquid phase after cooling is discharged into water treatment system as lime set, the water in saponification waste lye vaporized after being heated obtained water evaporation gas phase from The tower top discharge of salkali waste evaporating column.
- 2. technique according to claim 1, it is characterised in that in salkali waste evaporating column tower reactor with being set on pump inlet pipeline Ultrasonic cleaner.
- 3. technique according to claim 1, it is characterised in that the salkali waste evaporating column tower reactor liquid phase is between evaporator and tower reactor With circulating pump forced circulation.
- 4. according to any one of the claim 1-3 techniques, it is characterised in that the salkali waste evaporating column is tower structure, demister Salkali waste evaporating column top is arranged on, the cyclone hydraulic separators is arranged on top gaseous phase pipeline, for carrying out gas-liquid phase separation.
- 5. technique according to claim 1, it is characterised in that compressor used is that compression ratio is less than 2.
- 6. according to the technique of claim 1 or 5, it is characterised in that compressor used is lobed rotor compressor, centrifugal compressor One kind in machine or air blower.
- 7. according to any one of the claim 1-3 techniques, it is characterised in that the salkali waste evaporation column overhead temperatures are 95-100 DEG C.
- 8. according to any one of the claim 1-3 techniques, it is characterised in that the salkali waste evaporating column bottom temperature is 95-105 DEG C.
- 9. according to any one of claim 1-3 or 5 techniques, it is characterised in that the compressor exit temperature is 105-115 DEG C.
- 10. according to any one of the claim 1-3 techniques, it is characterised in that evaporation gas phase is discharged from the tower top of salkali waste evaporating column Afterwards in the saponification waste lye after remaining concentration, solids content 50-60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610439353.0A CN107512751A (en) | 2016-06-17 | 2016-06-17 | A kind of concentration technology of cyclohexanone saponification waste lye |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610439353.0A CN107512751A (en) | 2016-06-17 | 2016-06-17 | A kind of concentration technology of cyclohexanone saponification waste lye |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107512751A true CN107512751A (en) | 2017-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610439353.0A Pending CN107512751A (en) | 2016-06-17 | 2016-06-17 | A kind of concentration technology of cyclohexanone saponification waste lye |
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| CN (1) | CN107512751A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759406A (en) * | 2019-12-06 | 2020-02-07 | 岳阳才益精细化工有限公司 | High-temperature concentration device for saponified waste alkali liquor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007033443A1 (en) * | 2005-09-22 | 2007-03-29 | Vlaamse Instelling Voor Technologisch Onderzoek N.V. (Vito) | Installation for the treatment of liquid |
| WO2010112673A1 (en) * | 2009-03-31 | 2010-10-07 | Hsp Engineering Ab Oy | A method for thermal concentration of a fluid |
| CN102923895A (en) * | 2012-11-07 | 2013-02-13 | 江苏迈克化工机械有限公司 | Method for disposing cyclohexanone saponified waste liquid |
| CN103585773A (en) * | 2013-06-07 | 2014-02-19 | 佛山汉维科技有限公司 | Vacuum agitation type energy-saving evaporation device |
| CN204380287U (en) * | 2014-12-31 | 2015-06-10 | 山东圣琪生物有限公司 | A kind of MVR evaporimeter |
-
2016
- 2016-06-17 CN CN201610439353.0A patent/CN107512751A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007033443A1 (en) * | 2005-09-22 | 2007-03-29 | Vlaamse Instelling Voor Technologisch Onderzoek N.V. (Vito) | Installation for the treatment of liquid |
| WO2010112673A1 (en) * | 2009-03-31 | 2010-10-07 | Hsp Engineering Ab Oy | A method for thermal concentration of a fluid |
| CN102923895A (en) * | 2012-11-07 | 2013-02-13 | 江苏迈克化工机械有限公司 | Method for disposing cyclohexanone saponified waste liquid |
| CN103585773A (en) * | 2013-06-07 | 2014-02-19 | 佛山汉维科技有限公司 | Vacuum agitation type energy-saving evaporation device |
| CN204380287U (en) * | 2014-12-31 | 2015-06-10 | 山东圣琪生物有限公司 | A kind of MVR evaporimeter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759406A (en) * | 2019-12-06 | 2020-02-07 | 岳阳才益精细化工有限公司 | High-temperature concentration device for saponified waste alkali liquor |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20171226 |