CN1295030A - Method for solving problem of alkali in vapor phase generated by evaporation of saponified waste alkali liquor - Google Patents
Method for solving problem of alkali in vapor phase generated by evaporation of saponified waste alkali liquor Download PDFInfo
- Publication number
- CN1295030A CN1295030A CN 99115632 CN99115632A CN1295030A CN 1295030 A CN1295030 A CN 1295030A CN 99115632 CN99115632 CN 99115632 CN 99115632 A CN99115632 A CN 99115632A CN 1295030 A CN1295030 A CN 1295030A
- Authority
- CN
- China
- Prior art keywords
- waste lye
- alkali
- saponification waste
- saponification
- evaporation
- 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.)
- Granted
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 52
- 239000003513 alkali Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001704 evaporation Methods 0.000 title claims abstract description 9
- 230000008020 evaporation Effects 0.000 title claims abstract description 6
- 239000012808 vapor phase Substances 0.000 title 1
- 238000007127 saponification reaction Methods 0.000 claims description 48
- 239000013530 defoamer Substances 0.000 claims description 13
- 208000035126 Facies Diseases 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000001018 Hibiscus sabdariffa Nutrition 0.000 description 1
- 235000005291 Rumex acetosa Nutrition 0.000 description 1
- 240000007001 Rumex acetosella Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 235000003513 sheep sorrel Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
In the process of evaporating and concentrating the saponified waste alkali liquor, the phenomenon that the gas-phase condensate carries alkali often occurs, so that the gas-phase condensate cannot be recycled and can only be discharged outside, and the environment is seriously influenced. The invention adopts the method of adding the organic silicon defoaming agent into the saponified waste alkali solution to be concentrated according to the proportion, thereby effectively solving the problem that the evaporation system of the saponified waste alkali solution carries alkali.
Description
The present invention relates to a kind of method that solves gas phase band alkali in the saponification waste lye evaporative process.Saponification waste lye is the waste liquid that will produce in the multiple Chemical Manufacture, and it mainly results from and need reach in the Chemical Manufacture of removing by product by saponification reaction.Saponification waste lye has the characteristics of high basicity, high chemical oxygen demand, and directly discharging is very serious to the pollution of environment.
Now, a kind of comparatively effectively treatment process is, after the saponification waste lye evaporation concentration, spissated saponification waste lye carried out burning disposal, and the gaseous condensate of evaporation can reuse again.Saponification waste lye carries out the existing patented technology of method of burning disposal.
Before burning disposal,, must carry out concentration to saponification waste lye for guaranteeing to burn effect.But saponification waste lye is the liquid of a kind of total solid content height, easily foaming, easy fouling.In evaporating concentration process, saponification waste lye is easy to foaming in a large number in the reboiler tubulation, causes the reboiler shell side pressure to rise, and the formation entrainment makes the gas phase band alkali that evaporates.Gaseous condensate causes severe contamination because band alkali can not be reused, and have to emit.The biochemical treatment extreme difference of saponification waste lye.For the successive production equipment, the discharging of successive saponification waste lye is a kind of huge infringement to the social benefit and the economic interests of enterprise.By retrieval WPI and Chinese patent index, this difficult problem still there is not effective solution both at home and abroad.And the object of the present invention is to provide a kind of method that solves gas phase band alkali in the saponification waste lye evaporating concentration process.
The present invention is achieved in that in the saponification waste lye storage tank, presses 0.25Kg/M
3Dosage with in the disposable adding saponification waste lye of defoamer, generally do not need to stir and other Forced Mixing means.Defoamer is: based on polymethyl siloxane, add the oil-in-water emulsion that proper amount of surfactant forms through emulsification.Wherein, the simple molecular structure formula of effective ingredient polymethyl siloxane is:
The existing at present domestic manufacturer of this defoamer produces in batches.The mode that defoamer adds can adopt: squeeze into or direct standby hole adding from trough with pump.Because defoamer is comparatively stable, it is less to run off with saponification waste lye, does not need continuous adding.The adding of defoamer also can reduce the shell side pressure of saponification waste lye vapo(u)rization system reboiler effectively.When the gas phase of saponification waste lye vapo(u)rization system is with alkali once more, can add defoamer once more by above-mentioned dosage.
Positively effect of the present invention just is, has thoroughly solved the problem of saponification waste lye boil-off gas facies tract alkali, has also solved a big environmental protection difficult problem.Simultaneously, gaseous condensate is reclaimed use, greatly reduces consumption.For the factory of a year discharging 10,000 tons of saponification waste lye evaporation condensates, behind enforcement the present invention, can save 450,000 yuan of effluent charge every year, in addition, reclaim gaseous condensate and can save 80,000 yuan.Using method of the present invention is simple, and is easy to operate, can not increase any investment in addition and realizes.
Example 1: saponification waste lye vapo(u)rization system charging 7.5M
3/ h, reboiler steam flow 2650Kg/h, reboiler shell side pressure 830KPa, gaseous condensate band alkali is deep yellow.Saponification waste lye 100M is arranged in the saponification waste lye storage tank
3Add the 25Kg defoamer to the saponification waste lye storage tank from standby hole, storage tank top, the reboiler shell side pressure begins to descend after two minutes, and under all constant situation of quantity of steam and saponification waste lye feeding quantity, the reboiler shell side pressure is reduced to 780KPa.After half an hour, the limpid alkali of not being with of gaseous condensate.At this moment, gaseous condensate is cut recovery system.
Example 2: saponification waste lye vapo(u)rization system feeding quantity is 7.4M
3/ h, reboiler steam flow 2480Kg/h, shell side pressure is 850KPa, gaseous condensate band alkali is sorrel.Saponification waste lye in the saponification waste lye storage tank has only 40M at this moment
3Stop saponification waste lye reinforced after, cleaned reboiler 7 hours with process water.Stored 95M in the saponification waste lye storage tank this moment
3Saponification waste lye, standby hole by the saponification waste lye storage tank adds the 25Kg defoamer in the saponification waste lye storage tank after, provide the steam of 2600Kg/h to the reboiler of saponification waste lye vapo(u)rization system, shell side pressure 100KPa, gaseous condensate recovers the limpid alkali of not being with after 10 minutes.Phlegma incision recovery system.
Example 3: saponification waste lye vapo(u)rization system feeding quantity 7.5M
3/ h.Reboiler steam flow 2400Kg/h reboiler shell side pressure 810KPa, gaseous condensate band alkali is red-brown.In the saponification waste lye storage tank, store 80M
3Saponification waste lye.Standby hole by the top adds the 20Kg defoamer in the saponification waste lye storage tank, under the constant situation of other conditions, the pressure of reboiler is reduced to 780KPa.After 40 minutes, gaseous condensate has become the limpid alkali of not being with.Cut recovery system with gaseous condensate this moment.
Claims (3)
1. a method that solves saponification waste lye boil-off gas facies tract alkali is characterized in that in saponification
Add defoamer in the charging of waste lye vapo(u)rization system (saponification waste lye).
2. a kind of side that solves saponification waste lye boil-off gas facies tract alkali according to claim 1
Method is characterized in that in the charging (saponification waste lye) to the saponification waste lye vapo(u)rization system
The amount of the middle defoamer that adds is about 0.25Kg/M
3, can discontinuously add.
3. a kind of side that solves saponification waste lye boil-off gas facies tract alkali according to claim 1
Method is characterized in that by any way defoamer being joined the saponification waste lye evaporation
In the charging of system (saponification waste lye).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991156323A CN1173890C (en) | 1999-11-06 | 1999-11-06 | Method for solving problem of alkali in vapor phase generated by evaporation of saponified waste alkali liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991156323A CN1173890C (en) | 1999-11-06 | 1999-11-06 | Method for solving problem of alkali in vapor phase generated by evaporation of saponified waste alkali liquor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1295030A true CN1295030A (en) | 2001-05-16 |
| CN1173890C CN1173890C (en) | 2004-11-03 |
Family
ID=5278565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991156323A Expired - Fee Related CN1173890C (en) | 1999-11-06 | 1999-11-06 | Method for solving problem of alkali in vapor phase generated by evaporation of saponified waste alkali liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1173890C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102574703A (en) * | 2009-09-24 | 2012-07-11 | 富士胶片印刷器材株式会社 | Apparatus for reducing waste lithographic printing plate developing liquid |
| TWI404561B (en) * | 2006-11-21 | 2013-08-11 | Au Optronics Corp | Solid defoaming agent |
| CN112551786A (en) * | 2020-11-04 | 2021-03-26 | 江苏瑞祥化工有限公司 | Method for removing epichlorohydrin from saponified wastewater by oxidation |
-
1999
- 1999-11-06 CN CNB991156323A patent/CN1173890C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI404561B (en) * | 2006-11-21 | 2013-08-11 | Au Optronics Corp | Solid defoaming agent |
| CN102574703A (en) * | 2009-09-24 | 2012-07-11 | 富士胶片印刷器材株式会社 | Apparatus for reducing waste lithographic printing plate developing liquid |
| CN102574703B (en) * | 2009-09-24 | 2013-04-17 | 富士胶片印刷器材株式会社 | Apparatus for reducing waste lithographic printing plate developing liquid |
| CN112551786A (en) * | 2020-11-04 | 2021-03-26 | 江苏瑞祥化工有限公司 | Method for removing epichlorohydrin from saponified wastewater by oxidation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1173890C (en) | 2004-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM + CHEMICAL CORPORATION Free format text: FORMER OWNER: BALIN BRANCH CORP. SINOPEC Effective date: 20090605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090605 Address after: Chaoyang District, Chaoyangmen, North Street, No. 22, No. Patentee after: Sinopec Corp. Address before: Hunan province Yueyang Yingshan Petrochemical Factory Patentee before: Baling Branch, China Petro-Chemical Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041103 Termination date: 20181106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |