CN115068984A - Separation recovery system of high polymer in resin production organic solvent - Google Patents
Separation recovery system of high polymer in resin production organic solvent Download PDFInfo
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- CN115068984A CN115068984A CN202210226340.0A CN202210226340A CN115068984A CN 115068984 A CN115068984 A CN 115068984A CN 202210226340 A CN202210226340 A CN 202210226340A CN 115068984 A CN115068984 A CN 115068984A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
- B01D21/262—Separation of sediment aided by centrifugal force or centripetal force by using a centrifuge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D2011/002—Counter-current extraction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention discloses a separation and recovery system for high polymer in an organic solvent in resin production, which comprises a first homogenizing pump, a first sedimentation device connected with the first homogenizing pump, a second homogenizing pump connected with the first sedimentation device, a second sedimentation device connected with the second homogenizing pump, a mud pump connected with the second sedimentation device, a centrifugal machine connected with the mud pump, a rich liquid tank connected with the centrifugal machine and a rich liquid pump connected with the rich liquid tank, wherein the rich liquid pump is connected with a rich liquid recovery pipeline; the first settling device is connected with the rich liquor tank; and a barren liquor groove is connected to the barren liquor extracting agent outlet of the second settling device, a barren liquor pump is connected to the barren liquor groove, and the barren liquor pump is connected with the first homogenizing pump. The system for separating and recovering the high polymer in the organic solvent for resin production, which adopts the structure, realizes the continuous separation of the high polymer and the solvent, reduces the production cost, improves the production efficiency, and simultaneously reduces the energy consumption and the labor force.
Description
Technical Field
The invention relates to the technical field of resin production, in particular to a separation and recovery system for high polymer in an organic solvent in resin production.
Background
In the fields of resin production, pharmacy, chemical industry and the like, a solvent is widely used as a carrier of reactants. The solvent is recycled, and the byproducts in the solvent are accumulated more and more along with the production, so that a high polymer is finally formed, or the solvent is flocculent, suspended or precipitated; the presence of these high polymers leads to a considerable decrease in the yield of the product, and the high polymers, due to their high viscosity, tend to adhere to and block equipment and piping, resulting in a short production cycle and necessitating shutdown for coke removal at intervals. Therefore, the device for separating and recovering the high polymer in the solvent is important production device equipment in industries such as resin production and the like. The traditional separation and recovery devices are various in types, comprise a mechanical filter, a sedimentation tank, an evaporator and the like, and are difficult to realize continuous separation and recovery due to the characteristic of high polymer viscosity. Present high polymer separation recovery unit is semi-mechanical semi-manual operation, and intermittent type formula operation, evaporimeter etc. still need consume a large amount of steam or electric energy, need regularly open equipment, and the high polymer in the manual cleaning equipment wastes time and energy, and production efficiency is low, and the solvent rate of recovery is low, still leads to the fact environmental protection scheduling problem easily.
In the fields of resin production and the like, how to realize continuous effective separation and recovery of high polymers and solvents changes intermittent production into continuous production, reduces production cost, improves production efficiency, and reduces energy consumption and labor force at the same time is a technical problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a separation and recovery system for high polymer in an organic solvent in resin production, which realizes continuous separation of the high polymer and the solvent, reduces the production cost, improves the production efficiency, and simultaneously reduces the energy consumption and labor force.
In order to achieve the purpose, the invention provides a system for separating and recovering a high polymer in an organic solvent in resin production, which comprises a first homogenizing pump, a first sedimentation device connected with the first homogenizing pump, a second homogenizing pump connected with the first sedimentation device, a second sedimentation device connected with the second homogenizing pump, a slurry pump connected with the second sedimentation device, a centrifugal machine connected with the slurry pump, a rich liquor tank connected with the centrifugal machine and a rich liquor pump connected with the rich liquor tank, wherein a rich liquor recovery pipeline is connected to the rich liquor pump;
the first settling device is connected with the rich liquor tank;
and a barren liquor groove is connected to a barren liquor extracting agent outlet of the second sedimentation device, a barren liquor pump is connected to the barren liquor groove, and the barren liquor pump is connected with the first homogenizing pump.
Preferably, a raw solvent line is connected to the inlet of the first homogenizing pump.
Preferably, an inlet of the second homogenizing pump is connected with an extractant line.
Preferably, a centrifuge solid phase outlet pipeline is connected to the centrifuge, the centrifuge solid phase outlet pipeline is connected to the packaging system, and the centrifuge is configured as a spiral sedimentation centrifuge.
Preferably, both the first homogenizing pump and the second homogenizing pump are provided as a dual-stage or multi-stage homogenizing pump.
Preferably, the extraction agent pipeline and the raw solvent pipeline are both connected with a flow interlocking meter.
Preferably, the flow of the crude solvent in the first settling device is maintained in laminar flow conditions such that settling occurs in the stokes zone at a settling rate
At this time
The values of mu and rho are determined by the proportion and physical properties of the solvent and the extractant, can be regarded as fixed values, and under a certain value range of Reynolds number Re, the equivalent diameter d1 of the first settling device depends on the flow velocity u of the solvent in the first settling device, namely the flow F of the original solvent pipeline 01 (ii) a Sedimentation deviceThe production capacity of the device is dependent on the sedimentation velocity u t And area of sedimentation, i.e. V ═ u t ×A。
Preferably, the flow rate u of the solvent in the first settling device is controlled to be 0.1m/s or less, and the temperature t in the first settling device is controlled to be 150 ℃ or less.
Therefore, the system for separating and recovering the high polymer in the organic solvent for resin production, which adopts the structure, has the following beneficial effects:
(1) the homogenizing pump is adopted and is arranged as a two-stage or multi-stage homogenizing pump, the homogenizing pump is used for scattering high polymers in a solvent at a high speed to form particles, the density of the high polymer particles is increased under the action of an extracting agent, the viscosity is reduced, the separation difficulty of the high polymers is effectively reduced, and the problem that the high polymers block equipment and pipelines is solved;
(2) the adopted separation and recovery flow is a two-stage or multi-stage sedimentation device plus a centrifugal machine separation device, the sedimentation device and the centrifugal machine device carry out three times or multiple times of step-by-step continuous separation, the step-by-step separation is more and more thorough, the bottleneck of separation and recovery of high polymers in the solvent in the fields of resin production and the like is solved, the intermittent production is changed into continuous production, the production efficiency is improved, the economic benefit is improved, the separation device does not adopt a traditional evaporation device and forced filtration, and the energy and manpower are saved;
(3) the extraction agent is adopted, and the flow of the extraction agent and the flow of the original solvent are subjected to linkage control, so that the ratio adjustment of the flow of the extraction agent and the flow of the original solvent is realized, and the addition amount of the extraction agent is controlled within a certain ratio range, so that the extraction and recovery of the solvent can be realized, the dosage of the extraction agent can be reduced, and the aim of further saving energy is fulfilled;
(4) the extraction agent countercurrent process is adopted to extract the absorption solvent, the extraction agent is recycled, the polymer is purified step by step along the process, the concentration countercurrent process of the extraction agent is increased step by step, a small amount of extraction agent is used to recover the high-concentration solvent, and the obtained solid phase is cleaner;
(5) the reasonable flow speed range and temperature range of the solvent in the settling device are adopted, and the separation and recovery capacity of the high polymer and the solvent is improved.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a flow chart of an embodiment of a system for separating and recovering a polymer in an organic solvent for resin production according to the present invention.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Examples
Fig. 1 is a flow chart of an embodiment of a separation and recovery system for high polymer in an organic solvent for resin production according to the present invention, and as shown in the figure, the present invention provides a separation and recovery system for high polymer in an organic solvent for resin production, which includes a first homogenizing pump 1, a first settling device 2 connected to the first homogenizing pump 1, a second homogenizing pump 3 connected to the first settling device 2, a second settling device 4 connected to the second homogenizing pump 3, a slurry pump 5 connected to the second settling device 4, a centrifuge 6 connected to the slurry pump 5, a rich liquid tank 7 connected to the centrifuge 6, and a rich liquid pump 8 connected to the rich liquid tank 7, wherein the rich liquid pump 8 is connected to a rich liquid recovery pipeline 9; the first settling device 2 is connected with the rich liquid tank 7; the lean solution groove 10 is connected to the lean solution extracting agent outlet of the second settling device 4, the lean solution groove 10 is connected to the lean solution pump 11, and the lean solution pump 11 is connected to the first homogenizing pump 1. The raw solvent line 12 is connected to the inlet of the first homogenizing pump 1. The first settling device carries out first settling separation on the high polymer particles, and the lean solution extractant is used for extracting the recovered solvent again to form a rich solution extractant; and the second settling device is used for carrying out secondary settling separation on the high polymer particles and extracting the recovered solvent for the first time by using the extracting agent to form the barren liquor extracting agent. The multi-stage settler utilizes the natural settling principle of particles in a liquid phase, and the separation device does not adopt an evaporation device to evaporate and recover a solvent, thereby saving steam energy, not adopting forced filtration and saving electric energy and manpower; the centrifugal machine is a spiral sedimentation centrifugal machine and has the function of realizing the third effective separation of liquid phase and solid phase.
An extractant line 13 is connected to the inlet of the second homogenizing pump 3. The extraction agent is adopted, the extraction agent can effectively extract and recover the solvent, the density of polymer particles is increased, the viscosity is reduced, the flow linkage meter is arranged between an extraction agent pipeline and an original solvent pipeline, the ratio adjustment of the flow of the extraction agent and the flow of the original solvent is realized, the adding amount of the extraction agent is controlled within a certain ratio range, the extraction and the recovery of the solvent can be realized, the using amount of the extraction agent can be reduced, and the purpose of energy conservation is achieved. The extraction agent is adopted to extract the absorption solvent in a counter-current process, and the extraction agent is recycled. Firstly, extracting the high polymer particles separated by the second sedimentation by using an extracting agent, wherein the concentration of the solvent contained in the extracting agent is increased to form a lean solution extracting agent, then the lean solution extracting agent is used for extracting the high polymer particles separated by the first sedimentation, and the concentration of the solvent contained in the extracting agent is further increased to form a rich solution extracting agent; thus, a small amount of extractant is used for recovering the solvent with high concentration, and the obtained solid phase is cleaner, thereby realizing the continuous effective separation of the high polymer and the solvent and ensuring the continuous operation of a production system.
The centrifuge 6 is connected with a centrifuge solid phase outlet pipeline 14, the centrifuge solid phase outlet pipeline 14 is connected with a packaging system, and the centrifuge 6 is set as a spiral sedimentation centrifuge.
The first homogenizing pump 1 and the second homogenizing pump 3 are both double-stage or multi-stage homogenizing pumps, fine gears and homogenizers are arranged in the first homogenizing pump and the second homogenizing pump, high-speed scattering is carried out on high polymers in a solvent, the high polymers are changed into particles, the density of the high polymers is increased under the action of an extracting agent, and the viscosity is reduced.
The extracting agent pipeline 13 and the original solvent pipeline 12 are both connected with a flow interlocking meter.
The flow of the original solvent in the first sedimentation device is kept in a laminar flow state, so that the sedimentation occurs in a stokes area, and the sedimentation velocity at the moment
At this time
The values of mu and rho are determined by the proportion and physical properties of the solvent and the extractant, can be regarded as fixed values, and under a certain value range of Reynolds number Re, the equivalent diameter d1 of the first settling device depends on the flow velocity u of the solvent in the first settling device, namely the flow F of the original solvent pipeline 01 (ii) a The capacity of the settling device then depends on the settling velocity u t And area of sedimentation, i.e. V ═ u t And (4) x A. The flow rate u of the solvent in the first settling device is controlled to be below 0.1m/s, and the temperature t in the first settling device is controlled to be below 150 ℃.
The working process is as follows: the extractant enters one inlet of the second homogenizing pump via the extractant pipeline, the flow rate of the extractant and the flow rate of the original solvent are linked and the ratio is regulated, the solid phase separated from the first settling device enters the other inlet of the second homogenizing pump, and the high polymer is changed into particles and is dispersed in the second homogenizing pump and the viscosity is reduced under the action of the extractant.
Secondly, the liquid-solid mixture at the outlet of the second homogenizing pump enters a second sedimentation device, and the high polymer is subjected to secondary sedimentation separation in the second sedimentation device; extracting and recovering the solvent for the first time by the extractant in a second settling device to form a barren solution extractant, and storing the barren solution extractant in a barren solution tank; the solid phase separated from the second settling device enters a slurry pump.
Thirdly, solid phase at an outlet of the slurry pump enters a centrifugal machine, high polymer is subjected to third separation in the centrifugal machine, solid-liquid separation is further performed, and solid is conveyed to a packaging system through a solid phase outlet pipeline of the centrifugal machine; and the liquid phase at the outlet of the centrifuge enters a pregnant solution tank, and is recovered to the production system through a pregnant solution recovery pipeline for recycling.
Fourthly, the barren liquor extracting agent in the barren liquor tank enters a barren liquor pipeline through a barren liquor pump and then enters an inlet of a first homogenizing pump; the raw solvent line containing high polymer enters the other inlet of the first homogenizing pump; the high polymer becomes particulate and highly dispersed in the first homogenizing pump.
Fifthly, the solid-liquid mixture at the outlet of the first homogenizing pump enters a first sedimentation device, and the high polymer is separated for the first time in the first sedimentation device; extracting and recovering the solvent again by the lean solution extractant in the first settling device to form a rich solution extractant, and feeding the rich solution extractant into a rich solution tank; the solid phase separated from the first settling device enters a second homogenizing pump, and then, a circulation operation is completed.
Sixthly, the whole operation is controlled, unattended operation is realized, the system is closed, and continuous circulating operation is realized.
Therefore, the system for separating and recovering the high polymer in the organic solvent for resin production, which adopts the structure, realizes the continuous separation of the high polymer and the solvent, reduces the production cost, improves the production efficiency, and simultaneously reduces the energy consumption and the labor force.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (8)
1. A separation recovery system of high polymer in resin production organic solvent is characterized in that:
the device comprises a first homogenizing pump, a first sedimentation device connected with the first homogenizing pump, a second homogenizing pump connected with the first sedimentation device, a second sedimentation device connected with the second homogenizing pump, a mud pump connected with the second sedimentation device, a centrifugal machine connected with the mud pump, a pregnant solution tank connected with the centrifugal machine and a pregnant solution pump connected with the pregnant solution tank, wherein the pregnant solution pump is connected with a pregnant solution recovery pipeline;
the first settling device is connected with the rich liquor tank;
and a barren liquor groove is connected to a barren liquor extracting agent outlet of the second sedimentation device, a barren liquor pump is connected to the barren liquor groove, and the barren liquor pump is connected with the first homogenizing pump.
2. The system for separating and recovering the high polymer in the organic solvent for resin production according to claim 1, wherein: and a raw solvent pipeline is connected to the inlet of the first homogenizing pump.
3. The system for separating and recovering the high polymer in the organic solvent for resin production according to claim 2, wherein: and the inlet of the second homogenizing pump is connected with an extractant pipeline.
4. The system for separating and recovering the high polymer in the organic solvent for resin production according to claim 3, wherein: the centrifuge is connected with a centrifuge solid phase outlet pipeline, the centrifuge solid phase outlet pipeline is connected with a packaging system, and the centrifuge is set to be a spiral sedimentation centrifuge.
5. The system for separating and recovering the high polymer in the organic solvent for resin production according to claim 4, wherein: the first homogenizing pump and the second homogenizing pump are both configured as dual or multi-stage homogenizing pumps.
6. The system for separating and recovering the high polymer in the organic solvent for resin production according to claim 5, wherein: and the extraction agent pipeline and the original solvent pipeline are both connected with a flow interlocking meter.
7. The system for separating and recovering the high polymer in the organic solvent for resin production according to claim 6, wherein: the flow of the original solvent in the first sedimentation device is kept in a laminar flow state, so that the sedimentation occurs in a stokes area, and the sedimentation velocity at the moment
At this time
The values of mu and rho are determined by the proportion and physical properties of the solvent and the extractant, can be regarded as fixed values, and under a certain value range of Reynolds number Re, the equivalent diameter d1 of the first settling device depends on the flow velocity u of the solvent in the first settling device, namely the flow F of the original solvent pipeline 01 (ii) a The capacity of the settling device then depends on the settling velocity u t And area of sedimentation, i.e. V ═ u t ×A。
8. The system for separating and recovering the high polymer in the organic solvent for resin production according to claim 7, wherein: the flow rate u of the solvent in the first settling device is controlled to be below 0.1m/s, and the temperature t in the first settling device is controlled to be below 150 ℃.
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| CN114057365A (en) * | 2020-08-07 | 2022-02-18 | 辽宁国重重质碳资源产业工程技术研究院有限公司 | Chemical extraction method and extraction system for oil-sludge separation |
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- 2022-03-09 CN CN202210226340.0A patent/CN115068984B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015081878A1 (en) * | 2013-12-05 | 2015-06-11 | 王兵 | System for recycling all oil base mud from oil base mud well drilling waste |
| CN206701038U (en) * | 2017-02-10 | 2017-12-05 | 上海筠雯节能技术服务有限公司 | A kind of heat pump steam-supplying system applied to sulfur recovery facility |
| CN107754568A (en) * | 2017-11-28 | 2018-03-06 | 沈建冲 | A kind of device and gas recovery process of low energy consumption flue gas trapping and recovering carbon dioxide |
| CN207886919U (en) * | 2017-12-22 | 2018-09-21 | 上海齐耀热能工程有限公司 | Residual neat recovering system |
| CN114057365A (en) * | 2020-08-07 | 2022-02-18 | 辽宁国重重质碳资源产业工程技术研究院有限公司 | Chemical extraction method and extraction system for oil-sludge separation |
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