CN202658137U - Solvent dewaxing device - Google Patents
Solvent dewaxing device Download PDFInfo
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- CN202658137U CN202658137U CN 201220265509 CN201220265509U CN202658137U CN 202658137 U CN202658137 U CN 202658137U CN 201220265509 CN201220265509 CN 201220265509 CN 201220265509 U CN201220265509 U CN 201220265509U CN 202658137 U CN202658137 U CN 202658137U
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- dewaxing
- oiling
- pipeline
- wax
- strainer
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Abstract
The utility model discloses a solvent dewaxing device, comprising a steam heater, a dewaxing stage crystallization system and a dewaxing stage filtering system, wherein the dewaxing stage crystallization system comprises a dewaxing crystallizer, the dewaxing stage filtering system adopts a two-stage dewaxing mode, the first stage dewaxing and the second stage dewaxing are respectively provided with a first stage dewaxing filter and a second stage dewaxing filter, a first stage dewaxing filter wax tank and a second stage dewaxing filter wax tank are respectively arranged behind the first stage dewaxing filter and the second stage dewaxing filter, and a de-oiling stage comprises a de-oiling filter and a de-oiling cerate heater. The solvent dewaxing device is characterized by also comprising a dewaxing aid storage tank, the outlet of the dewaxing aid storage tank is connected with a pipeline in which raw oil flows, before entering the dewaxing stage crystallization system, a pipeline between the steam heater and the dewaxing stage crystallization system is connected with a pipeline used by the de-oiling cerate heater for outputting de-oiling wax agent in the de-oiling stage, and a pipeline used by the second stage dewaxing filter for outputting dewaxing filtrate is connected with an inlet pipeline of the dewaxing crystallizer. According to the solvent dewaxing device, oil and wax components in low waxy hydrocarbon oil can be effectively separated, the dewaxed oil yield is improved, and the operation cost is reduced.
Description
Technical field
The utility model belongs to the solvent dewaxing field of hydrocarbon ils.Specifically, the utility model relates to a kind of device that is applicable to low waxy hydrocarbon Oil solvent dewaxing.
Background technology
In order to keep the low-temperature fluidity of lubricating oil, must in the production process of lubricant base, remove wax contained in the stock oil, to reduce condensation point or the pour point of lubricant base.The method of lube stock dewaxing has a variety of, and wherein the most frequently used is solvent dewaxing process.The principle of solvent dewaxing is exactly that stock oil and dewaxing solvent is miscible, then progressively cooling, utilize insoluble to the wax the component at low temperatures or oligodynamical of solvent and to the characteristic of other components dissolved, make wax crystallization in solution, solution is filtered, obtain dewaxed filtrate and slack wax, obtain respectively pressed oil and gatch behind the desolvation, oil is separated with wax.
The gatch that solvent dewaxing obtains contains more oil content and low-melting component, can not directly as wax product, need through de-oiling.Two sections de-oiling process integrations of at present one section dewaxing of general employing, the slack wax that namely dewaxes adds solvent cut and heats up, oil content and low-melting component in the dissolving slack wax, filtration obtains de-oiling filtrate and de-oiling slack wax, the de-oiling slack wax is pressed again de-oiling of said process, and the de-oiling temperature is higher than one section temperature of de-oiling, filters to obtain de-oiling filtrate and de-oiling slack wax, obtain respectively sweat oil and dewaxed oil behind the desolvation, dewaxed oil behind post-refining as wax product.
Solvent dewaxing technology and device not only can be used for removing the wax of lube stock, also can be for separating of the component of different zero pour in other oil products.For different oil products, because the different and product of the wax content of stock oil and wax molecular structure is different to the requirement of pour point, its solvent dewaxing process has larger difference.Isoparaffin in the wax component, with naphthenic hydrocarbon or the aromatic hydrocarbons of long side chain adopts the pour point of conventional solvent-dewaxing method reduction waxy oil more difficult more.For example: producing in the process of environment-friendly rubber extending oil with furfural extract oil, need to remove first the wax of extracting out in the oil, then could be with its raw materials for production as environment-friendly rubber extending oil.Yet, very difficult with the wax that conventional solvent dewaxing process removes in the furfural extract oil.No matter be the content of wax hydrocarbon ils that is obtained by the crude oil time processing, or the content of wax hydrocarbon ils that obtains after the secondary processing, when the wax content of hydrocarbon ils is low to a certain degree the time, can't adopt conventional solvent dewaxing unit production to meet the pressed oil that pour point requires, this class hydrocarbon ils just is called low content of wax hydrocarbon ils.
The utility model content
The purpose of this utility model is on the basis of existing apparatus, a kind of improved solvent dewaxing unit is provided, and this device can separate oil and the wax component in the low content of wax hydrocarbon ils effectively, makes low waxy hydrocarbon oil dewaxing become possibility, improve yield dewaxed oil, reduce running cost.
A kind of solvent dewaxing unit, comprise steam heater, dewaxing section crystal system and dewaxing section filtering system, dewaxing section crystal system has the dewaxing crystallizer, dewaxing section filtering system is two sections dewaxings, first paragraph dewaxing and second segment dewaxing have respectively first paragraph dewaxing strainer and second segment dewaxing strainer, be respectively equipped with first paragraph dewaxing strainer wax tank and second segment dewaxing strainer wax tank behind first paragraph dewaxing strainer and the second segment dewaxing strainer, the de-oiling section has de-oiling strainer and de-oiling slack wax well heater, wherein, this device is provided with the dewaxing agent storage tank, the outlet of dewaxing agent storage tank enters dewaxing section crystal system pipeline before with stock oil and links, the pipeline of the pipeline between steam heater and the dewaxing section crystal system and de-oiling section de-oiling slack wax well heater output dewaxed oil liquid links, and the pipeline of second segment dewaxing strainer output dewaxed filtrate links with the source line of dewaxing crystallizer.
In the preferred situation, be provided with liquid mixer between steam heater and dewaxing section crystal system, the pipeline that the outlet of dewaxing agent storage tank and stock oil enter before the liquid mixer links.In the preferred situation, between steam heater and dewaxing section crystal system, be provided with liquid mixer, the outlet of dewaxing agent storage tank enters liquid mixer pipeline before with stock oil and links, and the pipeline of the pipeline between steam heater and the liquid mixer and de-oiling section de-oiling slack wax well heater output dewaxed oil liquid links.
In the preferred situation, the outlet of dewaxing agent storage tank links with the pipeline that stock oil enters steam heater.
In the preferred situation, between second segment dewaxing strainer wax tank and de-oiling strainer, set gradually dewaxing slack wax slurries well heater and wax solution crystallization device; In the preferred situation, set gradually dewaxing slack wax slurries well heater and wax solution crystallization device between second segment dewaxing strainer wax tank and de-oiling strainer, the pipeline between steam heater and the dewaxing section crystal system and the pipeline between dewaxing slack wax slurries well heater and the wax solution crystallization device link; In the further preferred situation, between second segment dewaxing strainer wax tank and de-oiling strainer, set gradually dewaxing slack wax slurries well heater and wax solution crystallization device, be provided with liquid mixer between steam heater and dewaxing crystal system, the pipeline between the pipeline between steam heater and the liquid mixer and dewaxing slack wax slurries well heater and the wax solution crystallization device links.
The utility model also can arrange the device of heating dewaxing slack wax at the second segment strainer wax tank that dewaxes, and between second segment dewaxing strainer wax tank and de-oiling strainer wax solution crystallization device is set.
Described de-oiling section is preferably one section de-oiling.
In the preferred situation, de-oiling strainer filtrate outlet pipeline links with the dewaxing crystallizer of dewaxing section crystal system.(de-oiling strainer filtrate is as the diluting solvent of dewaxing)
Oil and wax component in the low content of wax hydrocarbon ils of the utility model energy effective separation reduce oil pour point, reduce the pressed oil loss, minimizing dewaxing agent usage quantity.
Description of drawings
Embodiment
Below in conjunction with description of drawings a kind of embodiment of the present utility model.
Stock oil is through pipeline 1 and enter steam heater 4 from the liquid dewaxing agent in the pipeline 2 (not marking the dewaxing agent storage tank among the figure) through pipeline 3, and mixed oil liquid enters mixing tank 7 through pipeline 5,6.Mixed oil liquid through pipeline 8 with enter 9 crystallizations of dewaxing crystallizer from the diluting solvent of pipeline 10 with from the second segment dewaxed filtrate of pipeline 21, the dewaxing crystallization fluid that reaches filtration temperature enters first paragraph dewaxing strainer 12 through pipeline 11 and filters, and cold wash solvent enters 12 flushings of first paragraph dewaxing strainer from pipeline 13.Dewaxed filtrate and cold wash filtrate are removed dewaxed filtrate solvent recovering system (not marking among the figure) through pipeline 14 after filtering, and obtain pressed oil behind the desolvation.Slack wax removes second segment dewaxing strainer charging stock tank 16 through pipeline 15 and diluting solvent from pipeline 17.The wax slurries enter second segment dewaxing strainer 19 through pipeline 18 and filter, cold wash solvent enters 19 flushings of second segment dewaxing strainer from pipeline 20, dewaxed filtrate and cold wash filtrate enter dewaxing crystallizer 9 as diluting solvent through pipeline 21 after filtering, and improve yield dewaxed oil.Slack wax enters second segment dewaxing strainer wax tank 23 through pipeline 22 and diluting solvent from pipeline 24.The slack wax slurries enter second segment dewaxing slack wax slurries well heater 26 through pipeline 25, wax solution namely can join mixing tank 7 entrances through pipeline 27,28 and 6, be used for replacing part or all of dewaxing agent, reduce de-oiling section load, also can enter wax solution crystallization device 30 with diluting solvent from pipeline 31 through pipeline 27,29 and lower the temperature.The wax slurries that reach filtration temperature enter de-oiling strainer 33 through pipeline 32 and filter, rinse solvent enters 33 flushings of de-oiling strainer through pipeline 34, de-oiling filtrate and flushing filtrate namely can be through pipeline 38 as dewaxing section diluting solvents, reduce the fresh solvent amount, also can remove de-oiling filtrate solvent recovering system (not marking among the figure) through pipeline 37, obtain sweat oil behind the desolvation, it is de-oiling slack wax solution that the de-oiling slack wax enters de-oiling slack wax well heater 36 heating and melting through pipeline 35, de-oiling slack wax solution both can be through pipeline 40,6 join mixing tank 7 entrances, be used for Substitute For Partial or whole dewaxing agents, also can remove de-oiling slack wax solvent recovering system through pipeline 39, behind the desolvation, obtain dewaxed oil.
Adopt above-mentioned embodiment, process Light lube oil (character sees Table 1) with following condition, the dewaxing filtration temperature is-15 ℃, dewaxing agent is the paraffin of 56 ℃ of fusing points, the mass ratio of dewaxing agent and stock oil is 0.05: 1, first paragraph dewaxing slack wax carries out the dewaxing second time through pulp, dewaxed filtrate is all as the crystallization diluting solvent that dewaxes for the first time for the second time, the dewaxing slack wax all enters wax solution crystallization device, de-oiling filtrate is all gone the filtrate recovery system, replaces whole dewaxing agents to recycle after the de-oiling slack wax heating and melting.After adding dewaxing agent, making low content of wax hydrocarbon ils remove high condensation point component at solvent dewaxing unit becomes possibility, and dewaxing agent recycles, and reduces cost.Adopt two-stage dewaxing can improve yield dewaxed oil.The pressed oil pour point that obtains through the utility model device is-9 ℃.
Table 1
| Light lube oil | |
| Pour point/ |
15 |
| 100 ℃ of viscosity/(mm 2/s) | 4.468 |
| 20 ℃ of density/(kg/m 3) | 904.9 |
| Carbon residue/% | ＜0.01 |
| Flash-point/℃ | 190 |
| Boiling range/ |
|
| 10％ | 359 |
| 30/％ | 389 |
| 50/％ | 408 |
| 70/％ | 424 |
Claims (10)
1. solvent dewaxing unit, comprise steam heater, dewaxing section crystal system and dewaxing section filtering system, dewaxing section crystal system has the dewaxing crystallizer, dewaxing section filtering system is two sections dewaxings, first paragraph dewaxing and second segment dewaxing have respectively first paragraph dewaxing strainer and second segment dewaxing strainer, be respectively equipped with first paragraph dewaxing strainer wax tank and second segment dewaxing strainer wax tank behind first paragraph dewaxing strainer and the second segment dewaxing strainer, the de-oiling section has de-oiling strainer and de-oiling slack wax well heater, it is characterized in that, this device is provided with the dewaxing agent storage tank, the outlet of dewaxing agent storage tank enters dewaxing section crystal system pipeline before with stock oil and links, the pipeline of the pipeline between steam heater and the dewaxing section crystal system and de-oiling section de-oiling slack wax well heater output dewaxed oil liquid links, and the pipeline of second segment dewaxing strainer output dewaxed filtrate links with the source line of dewaxing crystallizer.
2. according to device claimed in claim 1, it is characterized in that be provided with liquid mixer between steam heater and dewaxing section crystal system, the outlet of dewaxing agent storage tank enters liquid mixer pipeline before with stock oil and links.
3. according to device claimed in claim 2, it is characterized in that the pipeline of the pipeline between steam heater and the liquid mixer and de-oiling section de-oiling slack wax well heater output dewaxed oil liquid links.
4. according to device claimed in claim 1, it is characterized in that the outlet of dewaxing agent storage tank links with the pipeline that stock oil enters steam heater.
5. according to device claimed in claim 1, it is characterized in that, between second segment dewaxing strainer wax tank and de-oiling strainer, set gradually dewaxing slack wax slurries well heater and wax solution crystallization device.
6. according to device claimed in claim 5, it is characterized in that the pipeline between steam heater and the dewaxing section crystal system and the pipeline between dewaxing slack wax slurries well heater and the wax solution crystallization device link.
7. according to device claimed in claim 1, it is characterized in that de-oiling section de-oiling strainer filtrate outlet pipeline links with the dewaxing crystallizer of dewaxing section crystal system.
8. according to device claimed in claim 1, it is characterized in that the de-oiling of described de-oiling Duan Weiyi section.
9. according to device claimed in claim 1, it is characterized in that second segment dewaxing strainer wax tank is provided with the device of heating dewaxing slack wax, between second segment dewaxing strainer wax tank and de-oiling strainer wax solution crystallization device is set.
10. according to device claimed in claim 1, this device is provided with liquid mixer between steam heater and dewaxing section crystal system, the pipeline of the pipeline between steam heater and the liquid mixer and de-oiling section de-oiling slack wax well heater output dewaxed oil liquid links, the outlet of dewaxing agent storage tank links with the pipeline that stock oil enters steam heater, sets gradually dewaxing slack wax slurries well heater and wax solution crystallization device between second segment dewaxing strainer wax tank and de-oiling strainer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220265509 CN202658137U (en) | 2012-06-07 | 2012-06-07 | Solvent dewaxing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220265509 CN202658137U (en) | 2012-06-07 | 2012-06-07 | Solvent dewaxing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202658137U true CN202658137U (en) | 2013-01-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220265509 Expired - Lifetime CN202658137U (en) | 2012-06-07 | 2012-06-07 | Solvent dewaxing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202658137U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254937A (en) * | 2013-05-03 | 2013-08-21 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | Hydrocarbon oil dewaxing experimental instrument and experimental method thereof |
| CN103642524A (en) * | 2013-11-30 | 2014-03-19 | 大连隆星新材料有限公司 | Dewaxing production equipment |
-
2012
- 2012-06-07 CN CN 201220265509 patent/CN202658137U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103254937A (en) * | 2013-05-03 | 2013-08-21 | 中海油（青岛）重质油加工工程技术研究中心有限公司 | Hydrocarbon oil dewaxing experimental instrument and experimental method thereof |
| CN103254937B (en) * | 2013-05-03 | 2014-11-05 | 中国海洋石油总公司 | Hydrocarbon oil dewaxing experimental instrument and experimental method thereof |
| CN103642524A (en) * | 2013-11-30 | 2014-03-19 | 大连隆星新材料有限公司 | Dewaxing production equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |