CN110917709A - Extruder stagnant oil purification device and recovery and purification method thereof - Google Patents
Extruder stagnant oil purification device and recovery and purification method thereof Download PDFInfo
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Abstract
The invention provides a purification device and a recovery and purification method for stagnant oil in an extruder, which can prepare recyclable purified stagnant oil through the steps of impurity removal, precipitation, water removal, refining and purification, and solve the problems of stagnant oil resource waste and influence on environment and production. In addition, the purification device is provided with the impurity removal unit, the precipitation unit, the dewatering unit, the refining unit and the purification unit in one-to-one correspondence with the purification method, so that the corrosion loss of production can be reduced, the oil-water, particle and impurity separation efficiency is high, the purification device is simple and convenient to use, the stagnant oil can be automatically recycled as long as the purification device is started and purification conditions are set, the automation degree is high, and manual operation is reduced.
Description
Technical Field
The invention relates to the field of chemical industry, in particular to a stagnant oil purification device of an extruder and a recovery and purification method thereof.
Background
The stagnant oil in the extruder is mixed with dust or liquid drop pollutants or other metal processing lubricants in the industrial processing process, and if the stagnant oil containing the impurities is not properly treated, the production is influenced, the environment and the health of production personnel are influenced, and the mechanical equipment is corroded and damaged in the industrial production, and the production efficiency is also reduced. The oil recovery method generally used includes absorption, adsorption, condensation and the like. In order to meet the increasingly strict environmental requirements, the traditional stagnant oil recovery method needs to be improved and promoted. The patent for CN203990235U discloses a condensation oil gas embrane method oil gas recovery unit, and the loss oil gas that will retrieve carries out cooling separation through tertiary condensing system earlier, and through direct discharge to reach standard of membrane separation back air-purifying, the oil gas of enrichment reintroduces condensing system and handles. Further, for example, patent No. CN107709899A discloses a laterally wide container body in which an oil separation/recovery unit is disposed in a lateral manner. A gas outlet through which the compressed gas from which the oil has been separated flows out from the container main body is positioned at the upper portion of the other end side in the container main body. The lower portion of the container main body is divided into a first chamber on the gas flow inlet side and a second chamber on the gas flow outlet side by a partition plate. However, the patent does not allow for recyclable oils. Further, as disclosed in WO2017132980a1, a cryogenic oil and gas recovery device is disclosed, which comprises a cryogenic oil and gas separator, an adsorption unit and a refrigeration unit, but the method has no significant impurity removal effect.
In the field of stagnant oil recovery and purification, a plurality of practical problems to be treated in practical application still exist, and no specific solutions are provided.
Disclosure of Invention
The invention provides a stagnant oil purification device of an extruder and a recovery and purification method thereof to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the purification device comprises an impurity removal unit, a plurality of precipitation units connected with the impurity removal unit, a water removal unit connected with the precipitation units, a refining processing unit connected with the water removal unit, a purification unit connected with the refining processing unit, and an electric control unit used for controlling the impurity removal unit, the precipitation units, the water removal unit, the refining processing unit and the purification unit, wherein the purification unit comprises a first loading oil tank used for collecting refined stagnant oil, a filtering device used for filtering an auxiliary agent contained in the stagnant oil, a centrifugal device used for accelerating the separation of the auxiliary agent and the stagnant oil, and a second loading oil tank used for collecting stagnant oil obtained by filtering through the filtering device.
Optionally, the impurity removing unit includes a first filtering cavity and a second filtering cavity separated by a mesh screen, the first filtering cavity is disposed at an upper portion of the second filtering cavity, the initially stagnant oil is introduced into the first filtering cavity through a conduit, and a grid is disposed at a connection position of the conduit and the first filtering cavity; the second filters and holds the intracavity and be provided with suction filter device, just suction filter device is in the second filters the one end that holds the intracavity and sets up to the gondola water faucet form, suction filter device's the other end stretches into precipitation unit.
Optionally, a plurality of precipitation units include one-level precipitation tank and second grade precipitation tank, what the suction filtration device stretched into the upper portion of one-level precipitation tank, second grade precipitation tank upper portion is provided with the hole, the suction filtration device passes the hole realizes one-level precipitation tank and second grade precipitation tank intercommunication, just be provided with the valve on the suction filtration device.
Optionally, the water removal unit includes a separator, a heating device and a reflux pump, and the heating device is fixedly connected to the bottom of the separator, and the reflux pump is disposed on the sidewall of the separator and extends from the upper portion of the separator to the inside of the separator, so that stagnant oil after water removal and impurity removal through gravity settling can be subjected to multistage water removal in the separator.
Optionally, the filtering device and the centrifugal device are fixedly connected in the first loading oil tank, and the filtering device is communicated with the centrifugal device.
Optionally, an oil outlet is further formed in the bottom of the first loading oil tank, an oil inlet is formed in the upper portion of the second loading oil tank, the oil outlet is communicated with the oil inlet through a fixedly-arranged guide pipe, and a valve is arranged on the guide pipe.
Optionally, the adjunct is a solid decolorizing agent.
In addition, the invention also provides a method for recovering and purifying the stagnant oil by using the purification device of the stagnant oil of the extruding machine, which comprises the following steps:
(1) removing impurities: adjusting the acidic pH of the aqueous solution containing the stagnant oil and solids, introducing the acidic aqueous solution containing the stagnant oil and solids into an impurity removal unit for rough filtration to remove large-particle impurities in the stagnant oil, and adding a separating agent after preliminary precipitation of the stagnant oil, wherein the separating agent is a hydrophilic separating agent;
(2) and (3) precipitation: introducing the stagnant oil added with the separating agent into a primary precipitation tank for standing precipitation, separating out water and impurities in the stagnant oil after the water and the impurities are precipitated to the bottom, introducing the stagnant oil into a secondary precipitation tank through a suction filtration device at the upper end of the primary precipitation tank, and performing gravity settling to remove water and impurities;
(3) dewatering: leading the stagnant oil subjected to gravity settling, water removal and impurity removal into a separator, starting a vacuum pump, setting the temperature in the separator to be 100-120 ℃ when the vacuum degree in the separator is more than-0.06 MPa, and performing circulating reflux separation for 20-30 minutes;
(4) refining: feeding the dewatered stagnant oil into a refining tank, adding a solid decolorizing agent accounting for 20-30% of the weight of the stagnant oil, and refining at 75-100 ℃ for 10-30 minutes;
(5) purifying: and (3) sending the refined stagnant oil into a purification unit, and separating out a solid decolorant in the stagnant oil to obtain qualified stagnant oil.
Optionally, the separation of the solid decolorant is: and arranging a filtering device to separate the solid decolorant.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the method for recovering and purifying the stagnant oil of the extruding machine is combined with a set purifying device, and the stagnant oil obtained by filtering and circulating for many times and adding a separating agent and a solid decolorizing agent for treatment accords with the standard of recycling, so that the corrosion loss of production is reduced, the environmental pollution is reduced, and the reutilization of resources is realized.
2. According to the impurity removal unit in the stagnant oil purification device of the extruding machine, the mesh screen is provided with the first filtering cavity and the second filtering cavity, the suction filtration device is arranged in the second filtering cavity, large-particle impurities are removed through multiple physical barriers, the blocking risk of the large-particle impurities is reduced, and oil-water separation in the subsequent process is promoted.
3. The stagnant oil recovery and purification method has high oil-water, particle and impurity separation efficiency, the purification device is simple and convenient to use, the stagnant oil can be automatically recovered and utilized as long as the purification device is started and purification conditions are set, the automation degree is high, and manual operation is reduced.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic flow chart of a method for recovering and purifying stagnant oil in an extruder according to one embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a purification device in a method for recovering and purifying stagnant oil in an extruder according to one embodiment of the present invention;
fig. 3 is a schematic structural diagram of a middle suction filtration device of a purification device in a method for recovering and purifying stagnant oil in an extruder in one embodiment of the invention.
Description of reference numerals: 1-an impurity removal unit; 2-a precipitation unit and 3-a water removal unit; 4-a refining treatment unit; 5-a purification unit; 51-a filtration device; 6-a valve; 7-a suction filtration device; 8-mesh screen; 81-holes; 9-loading oil tank II.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it is to be understood that the terms "upper", "lower", "left", and "right", if any, may be used,
"right" and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the indicated device or component must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, terms describing positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those of ordinary skill in the art according to specific situations.
The invention relates to a purification device of an extruder and a recovery and purification method thereof, which are described in the following embodiments according to the figures 1-3:
the first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a method for recovering and purifying dead oil of an extruder, which includes the following steps:
(1) removing impurities: adjusting the acidic pH of the aqueous solution containing the stagnant oil and solids, introducing the acidic aqueous solution containing the stagnant oil and solids into an impurity removal unit for rough filtration to remove large-particle impurities in the stagnant oil, and adding a separating agent after preliminary precipitation of the stagnant oil, wherein the separating agent is a hydrophilic separating agent;
(2) and (3) precipitation: introducing the stagnant oil added with the separating agent into a primary precipitation tank for standing precipitation, separating out water and impurities in the stagnant oil after the water and the impurities are precipitated to the bottom, introducing the stagnant oil into a secondary precipitation tank through a suction filtration device at the upper end of the primary precipitation tank, and performing gravity settling to remove water and impurities;
(3) dewatering: leading the stagnant oil subjected to gravity settling, water removal and impurity removal into a separator, starting a vacuum pump, setting the temperature in the separator to be 100-120 ℃ when the vacuum degree in the separator is more than-0.06 MPa, and performing circulating reflux separation for 20-30 minutes;
(4) refining: feeding the dewatered stagnant oil into a refining tank, adding a solid decolorizing agent accounting for 20-30% of the weight of the stagnant oil, and refining at 75-100 ℃ for 10-30 minutes;
(5) purifying: and (3) sending the refined stagnant oil into a purification unit, and separating a solid decolorant in the stagnant oil through a filtering step to obtain qualified stagnant oil.
As shown in fig. 2 to 3, the present embodiment provides a purification apparatus used in combination with the above recovery purification method, the purification device comprises an impurity removal unit, a plurality of precipitation units connected with the impurity removal unit, a water removal unit connected with the precipitation units, a refining treatment unit connected with the water removal unit, and a purification unit connected with the refining treatment unit, and an electric control unit for controlling the impurity removal unit, the precipitation units, the water removal unit, the refining unit and the purification unit, wherein the purification unit comprises a first loading oil tank for collecting refined stagnant oil, the device comprises a filtering device for filtering the auxiliary agent contained in the stagnant oil, a centrifugal device for accelerating the separation of the auxiliary agent and the stagnant oil, and a loading oil tank II for collecting the stagnant oil obtained by filtering through the filtering device.
The impurity removing unit comprises a first filtering cavity and a second filtering cavity which are separated by a mesh screen, the first filtering cavity is arranged at the upper part of the second filtering cavity, initially stagnant oil is guided into the first filtering cavity through a guide pipe, and a grid is arranged at the joint of the guide pipe and the first filtering cavity; a suction filtration device is arranged in the second filtering containing cavity, one end of the suction filtration device in the second filtering containing cavity is arranged in a shower shape, and the other end of the suction filtration device extends into the precipitation unit; the plurality of precipitation units comprise a primary precipitation tank and a secondary precipitation tank, the suction filtration device extends into the upper part of the primary precipitation tank, the upper part of the secondary precipitation tank is provided with a hole, the suction filtration device penetrates through the hole to realize the communication between the primary precipitation tank and the secondary precipitation tank, and the suction filtration device is provided with a valve; the water removal unit comprises a separator, a heating device and a reflux pump, the heating device is fixedly connected to the bottom of the separator, and the reflux pump is arranged on the side wall of the separator and extends from the upper part of the separator to the inside of the separator, so that stagnant oil after being subjected to gravity settling, water removal and impurity removal can be subjected to multistage water removal in the separator; the filtering device and the centrifugal device are fixedly connected in the loading oil tank I, and the filtering device is communicated with the centrifugal device; the bottom of the first loading oil tank is also provided with an oil outlet, the upper part of the second loading oil tank is provided with an oil inlet, the oil outlet is communicated with the oil inlet through a fixedly arranged guide pipe, and the guide pipe is provided with a valve.
In the purification apparatus, in this embodiment, the auxiliary agent is the solid decoloring agent.
Example two:
as shown in fig. 1, the present embodiment provides a method for recovering and purifying dead oil of an extruder, which includes the following steps:
(1) removing impurities: adjusting the acidic pH value of the aqueous solution containing the stagnant oil and solids to 5-6, introducing the acidic aqueous solution containing the stagnant oil and solids into an impurity removal unit for rough filtration to remove large-particle impurities in the stagnant oil, and adding a separating agent after the stagnant oil is subjected to preliminary precipitation, wherein the separating agent is a hydrophilic separating agent; in the embodiment, the addition amount of the separating agent is 25-45% of the weight percentage of the stagnant oil, the separating agent is a high molecular polymer which has extremely strong alkyl and hydrophilicity, when the separating agent is used, the addition amount of the separating agent is controlled by a metering pump, the separating agent is uniformly and slowly added into an impurity removal unit, and the temperature in the impurity removal unit is controlled to be 40-70 ℃; the acid solvent is adjusted to be a phosphoric acid solution with the mass percentage concentration of 20 percent;
(2) and (3) precipitation: introducing the stagnant oil added with the separating agent into a primary precipitation tank for standing precipitation, separating out water and impurities in the stagnant oil after the water and the impurities are precipitated to the bottom, introducing the stagnant oil into a secondary precipitation tank through a suction filtration device at the upper end of the primary precipitation tank, and performing gravity settling to remove water and impurities; a liquid pump is arranged, a plurality of through holes are formed in the suction filtration device, the through holes are separated by arranging a film layer, when the liquid pump is started, the stagnant oil on the upper layer after being precipitated is sucked and filtered into the water removal unit, of course, in the embodiment, a driving motor connected with the liquid pump is arranged, but the connection method of the driving motor can be installed according to the use specification of the driving motor, and detailed description is omitted in the application;
(3) dewatering: leading the stagnant oil subjected to gravity settling, water removal and impurity removal into a separator, adding sodium hydroxide alkali liquor accounting for 1-2% of the stagnant oil by mass, starting a vacuum pump, setting the temperature in the separator to be 100-120 ℃ when the vacuum degree in the separator is more than-0.06 MPa, and performing circulating reflux separation for 20-30 minutes; in the embodiment, a driving motor is arranged and is connected with the vacuum pump;
(4) refining: feeding the dewatered dull oil into a refining tank, adding a solid decolorizing agent with the weight percentage of the dull oil being 20-30%, wherein the refining temperature is 75-100 ℃, and the refining time is 10-30 minutes;
(5) purifying: and (3) sending the refined stagnant oil into a purification unit, and separating a solid decolorant in the stagnant oil through a filtering step to obtain qualified stagnant oil.
As shown in fig. 2 to 3, the present embodiment provides a purification apparatus used in combination with the above recovery purification method, the purification device comprises an impurity removal unit, a plurality of precipitation units connected with the impurity removal unit, a water removal unit connected with the precipitation units, a refining treatment unit connected with the water removal unit, and a purification unit connected with the refining treatment unit, and an electric control unit for controlling the impurity removal unit, the precipitation units, the water removal unit, the refining unit and the purification unit, wherein the purification unit comprises a first loading oil tank for collecting refined stagnant oil, the device comprises a filtering device for filtering the auxiliary agent contained in the stagnant oil, a centrifugal device for accelerating the separation of the auxiliary agent and the stagnant oil, and a loading oil tank II for collecting the stagnant oil obtained by filtering through the filtering device. In addition, in this embodiment, the impurity removal unit, the precipitation unit, the water removal unit, the refining unit, and the purification unit in the purification apparatus are respectively provided with an electric control unit i, an electric control unit ii, an electric control unit iii, an electric control unit iv, and an electric control unit v, and the electric control unit i, the electric control unit ii, the electric control unit iii, the electric control unit iv, and the electric control unit v are all electrically connected to an electric control unit (not shown).
The impurity removing unit comprises a first filtering cavity and a second filtering cavity which are separated by a mesh screen, the first filtering cavity is arranged at the upper part of the second filtering cavity, initially stagnant oil is guided into the first filtering cavity through a guide pipe, and a grid is arranged at the joint of the guide pipe and the first filtering cavity; a suction filtration device is arranged in the second filtering containing cavity, one end of the suction filtration device in the second filtering containing cavity is arranged in a shower shape, and the other end of the suction filtration device extends into the precipitation unit; the second filters and holds chamber upper portion and be provided with the charge door, just the charge door is fixed to be provided with the measuring pump, the separating agent adds through the measuring pump the second filters and holds the intracavity.
The plurality of precipitation units comprise a primary precipitation tank and a secondary precipitation tank, the suction filtration device extends into the upper part of the primary precipitation tank, the upper part of the secondary precipitation tank is provided with a hole, the suction filtration device penetrates through the hole to realize the communication between the primary precipitation tank and the secondary precipitation tank, and the suction filtration device is provided with a valve;
the water removal unit comprises a separator, a heating device and a reflux pump, the heating device is fixedly connected to the bottom of the separator, and the reflux pump is arranged on the side wall of the separator and extends from the upper part of the separator to the inside of the separator, so that stagnant oil after being subjected to gravity settling, water removal and impurity removal can be subjected to multistage water removal in the separator; the filtering device and the centrifugal device are fixedly connected in the loading oil tank I, and the filtering device is communicated with the centrifugal device; the bottom of the first loading oil tank is also provided with an oil outlet, the upper part of the second loading oil tank is provided with an oil inlet, the oil outlet is communicated with the oil inlet through a fixedly arranged guide pipe, and the guide pipe is provided with a valve.
In the purification apparatus, in this embodiment, the auxiliary agent is the solid decoloring agent.
In this embodiment the impurity removal unit, the precipitation unit, the unit that removes water, the refining unit, the department of connecting in proper order of purification unit is provided with the valve for the operation of each step of control, be provided with total central controller in the electrical unit, when starting whole recovery purification flow, total central controller receives the information that comes from electrical unit one, electrical unit two, electrical unit three, electrical unit four and electrical unit five to make data analysis information, realize the automatic control to every step. And the electric control unit can be in communication connection with the user side, and an operator can monitor the purification device in time according to the display of the user side, so that the corrosion damage of production is reduced, and the purification efficiency is improved.
The recovered and purified dead oil is tested, and the results are as follows:
according to the detection data of the table, the dull oil prepared by the method is purified, meets the standard of reutilization, and can realize the reutilization of resources.
In conclusion, the stagnant oil recovery and purification method is high in oil-water, particle and impurity separation efficiency, the purification device is simple and convenient to use, the stagnant oil can be automatically recycled as long as the purification device is started and purification conditions are set, the automation degree is high, and manual operation is reduced.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, e.g., well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (9)
1. The purification device for the stagnant oil of the extruding machine is characterized by comprising an impurity removal unit, a plurality of precipitation units connected with the impurity removal unit, a water removal unit connected with the precipitation units, a refining processing unit connected with the water removal unit, a purification unit connected with the refining processing unit, and an electric control unit used for controlling the impurity removal unit, the precipitation units, the water removal unit, the refining processing unit and the purification unit, wherein the purification unit comprises a first loading oil tank used for collecting the stagnant oil after refining processing, a filtering device used for filtering an auxiliary agent contained in the stagnant oil, a centrifugal device used for accelerating the separation of the auxiliary agent and the stagnant oil, and a second loading oil tank used for collecting the stagnant oil obtained by filtering of the filtering device.
2. The purification device for stagnant oil in extruding machine according to claim 1, wherein the impurity removing unit comprises a first filtering cavity and a second filtering cavity which are separated by a mesh screen, the first filtering cavity is arranged at the upper part of the second filtering cavity, initial stagnant oil is introduced into the first filtering cavity through a conduit, and a grid is arranged at the joint of the conduit and the first filtering cavity; the second filters and holds the intracavity and be provided with suction filter device, just suction filter device is in the second filters the one end that holds the intracavity and sets up to the gondola water faucet form, suction filter device's the other end stretches into precipitation unit.
3. The apparatus for purifying standing oil in extruder as claimed in claim 1, wherein said plurality of settling units comprise a primary settling tank and a secondary settling tank, said suction filtration device extends into the upper portion of said primary settling tank, said secondary settling tank is provided with a hole at the upper portion, said suction filtration device passes through said hole to communicate the primary settling tank with the secondary settling tank, and said suction filtration device is provided with a valve.
4. The apparatus for purifying stagnant oil in extruding machine as claimed in claim 1, wherein the water removal unit comprises a separator, a heating device and a reflux pump, the heating device is fixedly connected to the bottom of the separator, the reflux pump is arranged on the side wall of the separator and extends from the upper part of the separator to the inside of the separator, so that stagnant oil after being subjected to gravity settling water removal and impurity removal can be subjected to multi-stage water removal in the separator.
5. The apparatus for purifying standing oil of an extruder as claimed in claim 1, wherein the filtering means and the centrifuging means are fixedly connected in the first loading oil tank, and the filtering means is in communication with the centrifuging means.
6. The apparatus for purifying standing oil of extruder as claimed in claim 5, wherein said first loading oil tank is further provided with an oil outlet at the bottom thereof, said second loading oil tank is provided with an oil inlet at the upper portion thereof, and said oil outlet is communicated with said oil inlet through a fixedly disposed conduit, said conduit being provided with a valve.
7. The apparatus for purifying standing oil of an extruder of claim 1, wherein the additive is a solid decolorant.
8. A method for recovering and purifying standing oil of the purification device of the standing oil of the extruding machine as claimed in claims 1 to 7, which is characterized by comprising the following steps:
(1) removing impurities: adjusting the acidic pH of the aqueous solution containing the stagnant oil and solids, introducing the acidic aqueous solution containing the stagnant oil and solids into the impurity removal unit for rough filtration to remove large-particle impurities in the stagnant oil, and adding a separating agent after preliminary precipitation of the stagnant oil, wherein the separating agent is a hydrophilic separating agent;
(2) and (3) precipitation: introducing the stagnant oil added with the separating agent into the precipitation unit for standing precipitation, separating out water and impurities in the stagnant oil after the stagnant oil is precipitated to the bottom, and allowing the stagnant oil to enter the secondary precipitation tank through a suction filtration device at the upper end of the primary precipitation tank for gravity precipitation to remove water and impurities;
(3) dewatering: leading the stagnant oil subjected to gravity settling, water removal and impurity removal into a separator, starting a vacuum pump, setting the temperature in the separator to be 100-120 ℃ when the vacuum degree in the separator is more than-0.06 MPa, and performing circulating reflux separation for 20-30 minutes;
(4) refining: feeding the dewatered stagnant oil into a refining tank, adding a solid decolorizing agent accounting for 20-30% of the weight of the stagnant oil, and refining at 75-100 ℃ for 10-30 minutes;
(5) purifying: and (3) feeding the refined stagnant oil into the purification unit, and separating out a solid decolorant in the stagnant oil to obtain qualified stagnant oil.
9. The method for dead oil recovery purification according to claim 8, wherein the separation of the solid decolorant is: and arranging a filtering device to separate the solid decolorant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911045671.9A CN110917709A (en) | 2019-10-30 | 2019-10-30 | Extruder stagnant oil purification device and recovery and purification method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911045671.9A CN110917709A (en) | 2019-10-30 | 2019-10-30 | Extruder stagnant oil purification device and recovery and purification method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103429725A (en) * | 2011-02-17 | 2013-12-04 | 耐思特石油公司 | Oil recovery method |
| CN104531325A (en) * | 2014-12-17 | 2015-04-22 | 南南铝业股份有限公司 | Purification method and equipment for waste hydraulic oil of extruding machine |
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- 2019-10-30 CN CN201911045671.9A patent/CN110917709A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103429725A (en) * | 2011-02-17 | 2013-12-04 | 耐思特石油公司 | Oil recovery method |
| CN104531325A (en) * | 2014-12-17 | 2015-04-22 | 南南铝业股份有限公司 | Purification method and equipment for waste hydraulic oil of extruding machine |
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