CN216273519U - Triethylamine hydrochloride waste water pretreatment device for AKD production - Google Patents
Triethylamine hydrochloride waste water pretreatment device for AKD production Download PDFInfo
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- CN216273519U CN216273519U CN202123042927.6U CN202123042927U CN216273519U CN 216273519 U CN216273519 U CN 216273519U CN 202123042927 U CN202123042927 U CN 202123042927U CN 216273519 U CN216273519 U CN 216273519U
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Abstract
The utility model relates to a triethylamine hydrochloride wastewater pretreatment device for AKD production, wherein the device comprises a triethylamine hydrochloride wastewater storage tank, a heat exchanger and a centrifuge, the heat exchanger is arranged between an outlet of the triethylamine hydrochloride wastewater storage tank and the centrifuge, the centrifuge is provided with a liquid phase outlet and a solid phase outlet, and the liquid phase outlet is communicated with a neutralization reaction kettle. By adopting the triethylamine hydrochloride wastewater pretreatment device for AKD production, AKD and fatty acid impurities in wastewater are treated by utilizing the heat exchanger and the centrifuge, the temperature of the triethylamine hydrochloride wastewater is reduced from 60 ℃ to 40 ℃ after passing through the heat exchanger, the AKD and the fatty acid are converted into solid state, then the solid phase in the wastewater is separated to the solid collecting tank by the one-inlet two-outlet centrifuge, the liquid phase is used for neutralization reaction, the soaps in triethylamine after the reaction with strong base are greatly reduced without bubbling, and the quality of the triethylamine is improved.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to the field of wastewater pretreatment equipment, and specifically relates to a triethylamine hydrochloride wastewater pretreatment device for AKD production.
Background
Alkyl Ketene Dimer (AKD) is an unsaturated lactone, can be used as a papermaking medium/alkaline sizing agent, and is mainly used for internal sizing of paper types such as copperplate base paper, copy paper, archival paper, dictionary paper, high-quality writing paper and the like. The pH value of the sizing agent can reach about 8.0, and the sizing agent is widely used at home and abroad.
There are two main processes for AKD synthesis:
one is a solvent method process, the main raw materials are triethylamine, fatty acid chloride and toluene, wherein the toluene is a solvent, in the synthesis reaction, due to the existence of the solvent toluene, the material fluidity is better, the viscosity is low, and a kettle type stirring mixing reaction mode is generally adopted;
the other is a solvent-free process, and the main raw materials are triethylamine and fatty acid chloride; in the later reaction stage of the process for synthesizing the papermaking auxiliary agent AKD by the solvent-free method, the material has high viscosity, and contains fine triethylamine hydrochloride solid particles, the material viscosity can reach 130000mPa.s at the temperature T65 ℃, and after the reaction is finished, the triethylamine hydrochloride solid particles in the AKD product need to be dissolved in the solution, so that the layering of the AKD in the triethylamine hydrochloride aqueous solution is realized, and the AKD product with high purity is obtained.
Triethylamine (molecular formula: N (CH)2CH3)3) Is an amine organic compound, is colorless to light yellow transparent liquid, has strong ammonia odor, is slightly fuming in the air, is slightly soluble in water, can be dissolved in ethanol and ether, is alkaline in aqueous solution, and is organic base, catalyst, solvent and raw material commonly used in the synthesis of medicaments. Triethylamine is used as an important auxiliary material for producing AKD, triethylamine hydrochloride generated after the triethylamine participates in AKD synthesis reaction exists in triethylamine hydrochloride wastewater, and strong base is utilized to react with the triethylamine hydrochloride to generate triethylamine and brine. Triethylamine was reused for AKD synthesis. But the triethylamine hydrochloride waste water can generate foaming phenomenon in the subsequent distillation process,affecting the distillation effect and the product quality.
In order to solve the problem, a triethylamine hydrochloride wastewater pretreatment device needs to be provided, so that the bubbling phenomenon is avoided, and the quality of triethylamine is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a triethylamine hydrochloride wastewater pretreatment device for AKD production, which can improve the quality of triethylamine.
In order to achieve the above object, the present invention provides a triethylamine hydrochloride wastewater pretreatment apparatus for AKD production, comprising:
the triethylamine hydrochloride wastewater pretreatment device for AKD production is mainly characterized by comprising a triethylamine hydrochloride wastewater storage tank, a heat exchanger and a centrifuge, wherein the heat exchanger is arranged between an outlet of the triethylamine hydrochloride wastewater storage tank and the centrifuge, the centrifuge is provided with a liquid phase outlet and a solid phase outlet, and the liquid phase outlet is communicated with a neutralization reaction kettle.
After passing through the heat exchanger, the temperature of the wastewater is reduced from 60 ℃ to 40 ℃, and AKD and fatty acid impurities in the wastewater can be changed into solid from liquid.
Preferably, the apparatus includes a solids collection tank in communication with the solids outlet of the centrifuge.
Preferably, the heat exchanger is provided with a wastewater inlet and a wastewater outlet, the wastewater inlet of the heat exchanger is communicated with the outlet of the triethylamine hydrochloride wastewater storage tank, and the wastewater outlet of the heat exchanger is connected with the inlet of the centrifuge.
According to the triethylamine hydrochloride wastewater pretreatment device for AKD production, AKD and fatty acid impurities in wastewater are treated by using the heat exchanger and the centrifuge, the temperature of the triethylamine hydrochloride wastewater is reduced from 60 ℃ to 40 ℃ after passing through the heat exchanger, the AKD and the fatty acid are converted into solid state, then the solid phase in the wastewater is separated to the solid collecting tank by the one-inlet two-outlet centrifuge, the liquid phase is used for neutralization reaction, soaps in triethylamine after the reaction with strong base are greatly reduced, no foaming is caused, and the quality of triethylamine is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of a triethylamine hydrochloride wastewater pretreatment device for AKD production according to the present invention.
Reference numerals:
1 triethylamine hydrochloride waste water storage tank
2 heat exchanger
3 centrifugal machine
4 neutralization reaction kettle
5 solid collecting tank
Detailed Description
In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.
Fig. 1 shows an embodiment of a triethylamine hydrochloride wastewater pretreatment device for AKD production according to the present invention. The system comprises a triethylamine hydrochloride wastewater storage tank 1, a heat exchanger 2, a centrifuge 3, a solid collection tank 5 and a neutralization reaction kettle 4. The outlet of the triethylamine hydrochloride wastewater storage tank is connected with the wastewater inlet of the heat exchanger 2, the wastewater outlet of the heat exchanger is connected with the inlet of the centrifuge, the centrifuge is provided with two outlets, namely a solid-phase outlet and a liquid-phase outlet, the solid-phase outlet is communicated with the solid collecting tank 5, and the liquid-phase outlet is communicated with the neutralization reaction kettle 4.
Further comprises a distillation system which is communicated with the neutralization reaction kettle 4.
Triethylamine is used as an important auxiliary material for producing AKD, triethylamine hydrochloride generated after the triethylamine participates in AKD synthesis reaction exists in triethylamine hydrochloride wastewater, strong base is generally used for reacting with the triethylamine hydrochloride wastewater to generate triethylamine and brine, the generated triethylamine is introduced into a distillation system for distillation and recovery, and the triethylamine is recycled. Practices and researches show that AKD and fatty acid impurities exist in the triethylamine salt water wastewater, the AKD and fatty acid impurities and strong base generate soaps, and the soaps generate bubbles, so that in the subsequent triethylamine distillation process, a distillation system fluctuates, the purity of triethylamine is insufficient, the quality of triethylamine products is reduced, and the triethylamine water content which is difficult to meet the requirements of the existing process is less than or equal to 0.3%.
Based on the problems discovered by the present invention as described above, the pretreatment device of the present invention is provided. The triethylamine hydrochloride wastewater pretreatment device provided by the utility model is provided with a heat exchanger and a centrifugal machine, wherein the heat exchanger is used for reducing the temperature of the triethylamine hydrochloride wastewater from 60 ℃ to 40 ℃ and converting AKD and fatty acid impurities into solid state; and separating the solid phase in the wastewater to a solid collecting tank by a one-inlet two-outlet centrifugal machine, wherein the liquid phase is used for neutralization reaction. The water content of triethylamine can be stably controlled below 0.3%, and simultaneously, the content of uncertain impurities in triethylamine is obviously reduced, and the quality of AKD products is improved.
According to the triethylamine hydrochloride wastewater pretreatment device for AKD production, AKD and fatty acid impurities in wastewater are treated by using the heat exchanger and the centrifuge, the temperature of the triethylamine hydrochloride wastewater is reduced from 60 ℃ to 40 ℃ after passing through the heat exchanger, the AKD and the fatty acid are converted into solid state, then the solid phase in the wastewater is separated to the solid collecting tank by the one-inlet two-outlet centrifuge, the liquid phase is used for neutralization reaction, soaps in triethylamine after the reaction with strong base are greatly reduced, no foaming is caused, and the quality of triethylamine is improved.
In this specification, the utility model has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the utility model. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (3)
1. The utility model provides a triethylamine hydrochloride waste water pretreatment device for AKD production, its characterized in that, the device include triethylamine hydrochloride waste water storage tank, heat exchanger and centrifuge, the heat exchanger set up the export of triethylamine hydrochloride waste water storage tank with centrifuge between, centrifuge have liquid phase export and solid phase export, the liquid phase export be used for being linked together with neutralization reaction cauldron.
2. The pretreatment device of triethylamine hydrochloride wastewater for AKD production according to claim 1, wherein said device comprises a solids collection tank, said solids collection tank being in communication with a solid phase outlet of said centrifuge.
3. The pretreatment device of triethylamine hydrochloride wastewater for AKD production according to claim 1, wherein said heat exchanger has a wastewater inlet and a wastewater outlet, said wastewater inlet of said heat exchanger is connected to the outlet of said triethylamine hydrochloride wastewater tank, and said wastewater outlet of said heat exchanger is connected to the inlet of said centrifuge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123042927.6U CN216273519U (en) | 2021-12-06 | 2021-12-06 | Triethylamine hydrochloride waste water pretreatment device for AKD production |
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| CN202123042927.6U CN216273519U (en) | 2021-12-06 | 2021-12-06 | Triethylamine hydrochloride waste water pretreatment device for AKD production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110395857A (en) * | 2018-04-19 | 2019-11-01 | 北京中科国通环保工程技术股份有限公司 | The method and apparatus for handling oil-containing hydrous matter |
| CN116730952A (en) * | 2023-08-14 | 2023-09-12 | 山东天安化工股份有限公司 | Preparation method of alkyl ketene dimer |
-
2021
- 2021-12-06 CN CN202123042927.6U patent/CN216273519U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110395857A (en) * | 2018-04-19 | 2019-11-01 | 北京中科国通环保工程技术股份有限公司 | The method and apparatus for handling oil-containing hydrous matter |
| CN116730952A (en) * | 2023-08-14 | 2023-09-12 | 山东天安化工股份有限公司 | Preparation method of alkyl ketene dimer |
| CN116730952B (en) * | 2023-08-14 | 2023-11-10 | 山东天安化工股份有限公司 | Preparation method of alkyl ketene dimer |
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