CN108569739A - System and method for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid - Google Patents
System and method for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid Download PDFInfo
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- CN108569739A CN108569739A CN201810238231.4A CN201810238231A CN108569739A CN 108569739 A CN108569739 A CN 108569739A CN 201810238231 A CN201810238231 A CN 201810238231A CN 108569739 A CN108569739 A CN 108569739A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
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Abstract
The present invention provides a kind of system for recycling OP 10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, including vacuum-concentrcted device, condenser, the first concentrate buffer tank, the second concentrate buffer tank and fluid reservoir, the first packing case and the second packing case for storing initial waste liquid；Vacuum-concentrcted device is connect by different pipelines with fluid reservoir, the first concentrate buffer tank, the second concentrate buffer tank and condenser respectively, the bottom of condenser is connected with the condensate liquid receiving tank for accepting condensate liquid, first concentrate buffer tank is connect with the first packing case, and the second concentrate buffer tank is connect with the second packing case.The present invention also provides a kind of methods carrying out recycling OP 10 using above system.The recovery system of the present invention can effectively recycle OP 10 and energy consumption is relatively low, and 10 concentration of OP in the liquid after recycling can be up to 20wt% or more, can be used as new product and sold, not only increased the output value but also more environmentally friendly.
Description
Technical field
The present invention relates to technical field of chemical synthesis, more particularly to are used to recycle in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid
The system and method for OP-10.
Background technology
In fluorine chemical process, polytetrafluoroethylene (PTFE) (PTFE) concentration dispersion liquid is that PTFE solid particles are poly- in alkyl phenol
The product emulsion with certain stability formed under the action of oxyethylene group ether (OP-10) types of emulsifiers, solid content are usual
It is 60 ± 2%, has a large amount of low concentration alkylphenol-polyethenoxy base ether (OP-10) in production and discharged into clean water system,
Concentration and recovery utilization is carried out to part OP-10, not only reduces environmental pollution, but also considerable benefit can be increased.
The obtained product PTFE contents of process for producing polytetrafluoroethylene (PTFE) (PTFE) concentration dispersion liquid are relatively low, generally
20%, it is concentrated, improves the content of PTFE.Chemical method concentration is that OP-10 types are being added in low concentration PTFE emulsion
After surfactant, more stable emulsification system is formed, when temperature is increased to the cloud point (60 DEG C~65 DEG C of cloud point) of emulsifier
When above, emulsifiability is greatly lowered, and so that a large amount of water is generated with lotion under the action of electrolyte and detaches, stops stirring
It carries out after being layered and extracting supernatant liquor out, lower layer's lotion is concentrated, and is made through analysis allotment to 60 ± 2% progress finished product packings
With.OP-10 solution (about 2-3% or so) of the supernatant liquor containing low concentration, has strong foam performance, according to conventional dense
Contracting method not only high energy consumption and cannot effectively be concentrated OP-10, and direct emission causes serious pollution to environment, and one
As be to be emitted into sewage disposal system and be further processed qualification to discharge, can generate certain economy by recycling comprehensive utilization
Benefit.
Invention content
It is an object of the invention to overcome drawbacks described above, providing a kind of can effectively recycle OP-10 and the lower use of energy consumption
The system and method for OP-10 in recycling polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
The present invention provides a kind of system for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, including vacuum
Decompression concentrator, condenser, the first concentrate buffer tank, the second concentrate buffer tank and the liquid storage for storing initial waste liquid
Tank, the first packing case, the second packing case, first pipe, second pipe, third pipeline and the 4th pipeline；
The liquid outlet of the first concentrate buffer tank is communicated with the first discharge nozzle and the second discharge nozzle, and the second concentrate is slow
The liquid outlet for depositing tank is communicated with third discharge nozzle and the 4th discharge nozzle；
The feed inlet of the vacuum-concentrcted device is discharged with first discharge nozzle and third respectively by first pipe
Pipe is connected to, and the discharge port of the vacuum-concentrcted device passes through the second pipe feed liquor with the first concentrate buffer tank respectively
Mouth is connected to the inlet of the second concentrate buffer tank；First packing case passes through the second discharge nozzle and first concentrate
Buffer tank connects, and second packing case is connect by the 4th discharge nozzle with the second concentrate buffer tank；In the first pipe
Equipped with the first water pump and filter, first water pump is close to the liquid outlet of the first concentrate buffer tank, the filter
Close to the feed inlet of the vacuum-concentrcted device；
The liquid outlet of the fluid reservoir is connected to by the first pipe between third pipeline and the first water pump and filter, institute
It states third pipeline and is equipped with the second water pump；
Exhaust outlet is equipped at the top of the vacuum-concentrcted device, the exhaust outlet is connected by the 4th pipeline and the condenser
It connects；The bottom of the condenser is connected with the condensate liquid receiving tank for accepting condensate liquid.
The present invention also provides a kind of methods for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, including make
With the above-mentioned system for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, following steps are specifically included：
Step 1：After the liquid level in the fluid reservoir reaches 50%, the circulating cooling penstock of the condenser is opened,
Start the vacuum-concentrcted device, then when the pressure reduction in vacuum-concentrcted device is to -0.05MPa, opens liquid storage
Valve on the liquid outlet of tank, while starting the second water pump, the valve on the inlet of the first concentrate buffer tank is opened, simultaneously
It is 1.5~1.7m to adjust the second water pump and flow into the flow rate of liquid of vacuum-concentrcted device3/ h, then, when the first concentrate caches
The liquid of tank reaches 0.3m3Afterwards, the valve at the steam inlet of vacuum-concentrcted device is opened；
Step 2：After the operation for completing step 1, when the liquid level of the first concentrate buffer tank rises to 30%, opens first and go out
Valve in expects pipe, open the first water pump, adjust the first water pump flow into vacuum-concentrcted device flow rate of liquid be 1.9~
2.1m3/ h, meanwhile, it is 1.1~1.3m to adjust the second water pump and flow into the flow rate of liquid of vacuum-concentrcted device3/h；
Step 3：After the operation for completing step 2, when the liquid level of the first concentrate buffer tank rises to 80%, it is dense to measure first
The OP-10 concentration of contracting caching pot liquid, when OP-10 concentration reaches 20wt% or more, the first water pump of holding flows into vacuum decompression
The flow rate of liquid of inspissator is 1.9~2.1m3/ h, meanwhile, keep the second water pump to flow into the flow rate of liquid of vacuum-concentrcted device
For 1.1~1.3m3/ h, until the liquid level of the first concentrate buffer tank is up to 90%；When OP-10 concentration be less than 20wt%, then adjust
The flow rate of liquid that first water pump flows into vacuum-concentrcted device is 1.0~1.5m3/ h, meanwhile, keep the second water pump to flow into vacuum
The flow rate of liquid of decompression concentrator is 1.1~1.3m3/ h, until the liquid level of the first concentrate buffer tank is up to 90%；
Step 4：When the liquid level of the first concentrate buffer tank is up to 90%, at the inlet for opening the second concentrate buffer tank
Valve adjusts the valve of the inlet of the first concentrate surge tank to the pressure balance of the pressure and system of the second concentrate buffer tank
The valve openings of the inlet of door opening and the second concentrate surge tank are to maintain the liquid level of the first concentrate buffer tank to remain steady
The fixed OP-10 concentration for caching pot liquid up to the first concentration no longer rises, and the valve being then shut off on the first discharge nozzle is opened
The vacuum breaker valve of first concentrate buffer tank opens the valve on the second discharge nozzle, is concentrated using the first packing case pair first
Caching pot liquid is packed
The beneficial effects of the present invention are：(1) vacuum-concentrcted device is utilized, waste liquid (solution of low concentration OP-10) is made
One layer of liquid film is formed on tubulation, to which its foaminess be greatly lowered, moisture vaporizes efficiently thus by the OP- of low concentration
10 solution are condensed into high concentration OP-10 solution, and OP-10 progress in dispersion liquid waste liquid can be concentrated to polytetrafluoroethylene (PTFE) and is effectively concentrated back
Receipts are utilized again, increase economic benefit, meanwhile, mitigate the OP-10 concentration in relief liquor, mitigates environmental pollution, it is more environmentally-friendly；
(2) while the first and second concentrate buffer tank is set, the switching of two tank bodies uses so that entire concentration process can be with
Uninterruptedly, organic efficiency is improved；
(3) use the above method, can be only by OP-10 concentration 2-3wt% solution be concentrated into OP-10 at concentrations up to
The product of 20wt%, and traditional method for concentration is only capable of waste liquid being concentrated into a concentration of 5wt% or less of OP-10.
Description of the drawings
Fig. 1 is the main view that the embodiment of the present invention is used to recycle the system of OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid
Figure.
Label declaration：
1- vacuum-concentrcted devices；2- condensers；3- the first concentrate buffer tanks；4- the second concentrate buffer tanks；5- is stored up
Flow container；The first packing cases of 6-；The second packing cases of 7-；8- first pipes；
9- second pipes；10- third pipelines；The 4th pipelines of 11-；The first discharge nozzles of 12-；The second discharge nozzles of 13-；14-
Three discharge nozzles；The 4th discharge nozzles of 15-；The first water pumps of 16-；17- filters；The second water pumps of 18-；19- condensate liquid receiving tanks；20-
Vacuum generator；21- vacuum breaker valves.
Specific implementation mode
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment
And attached drawing is coordinated to be explained in detail.
The design of most critical of the present invention is：Using the evaporation mode of decompression falling liquid film, making waste liquid, (low concentration OP-10's is molten
Liquid) one layer of liquid film is formed on tubulation, to which its foaminess be greatly lowered, moisture vaporizes efficiently thus by low concentration
OP-10 solution is condensed into high concentration OP-10 solution.
Please refer to Fig. 1, the system for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid of the present embodiment, packet
It includes vacuum-concentrcted device 1, condenser 2, the first concentrate buffer tank 3, the second concentrate buffer tank 4 and initially gives up for storing
The fluid reservoir 5 of liquid, the first packing case 6, the second packing case 7, first pipe 8, second pipe 9, third pipeline 10 and the 4th pipeline
11；
The liquid outlet of the first concentrate buffer tank 3 is communicated with the first discharge nozzle 12 and the second discharge nozzle 13, and second is dense
The liquid outlet of contracting liquid buffer tank 4 is communicated with third discharge nozzle 14 and the 4th discharge nozzle 15；
The feed inlet of the vacuum-concentrcted device 1 by first pipe 8 respectively with first discharge nozzle 12 and third
Discharge nozzle 14 is connected to, and the discharge port of the vacuum-concentrcted device 1 is cached with first concentrate respectively by second pipe 9
The inlet of the inlet of tank 3 and the second concentrate buffer tank 4 is connected to；First packing case 6 by the second discharge nozzle 13 with
The first concentrate buffer tank 3 connects, and second packing case 7 passes through the 4th discharge nozzle 15 and the second concentrate buffer tank 4
Connection；The first pipe 8 is equipped with the first water pump 16 and filter 17, and first water pump 16 is close to first concentrate
The liquid outlet of buffer tank 3, feed inlet of the filter 17 close to the vacuum-concentrcted device 1；
The liquid outlet of the fluid reservoir 5 passes through the first pipe between third pipeline 10 and the first water pump 16 and filter 17
8 connections, the third pipeline 10 are equipped with the second water pump 18；
1 top of the vacuum-concentrcted device is equipped with exhaust outlet, and the exhaust outlet passes through the 4th pipeline 11 and the condensation
Device 2 connects；The bottom of the condenser 2 is connected with the condensate liquid receiving tank 19 for accepting condensate liquid.
As can be seen from the above description, the beneficial effects of the present invention are：Using vacuum-concentrcted device, make waste liquid (low concentration
The solution of OP-10) one layer of liquid film is formed on tubulation, to be greatly lowered its foaminess, moisture vaporize efficiently to
The OP-10 solution of low concentration is condensed into high concentration OP-10 solution, OP-10 in dispersion liquid waste liquid can be concentrated to polytetrafluoroethylene (PTFE)
It carries out effective concentration and recovery to be utilized again, increases economic benefit, meanwhile, mitigate the OP-10 concentration in relief liquor, mitigates environment
Pollution, it is more environmentally-friendly；First and second concentrate buffer tank is set simultaneously, and two tank body switchings use so that entire concentration process can
With uninterrupted, raising organic efficiency.
Further, the condenser 2 is connected with vacuum generator 20.
Further, the first concentrate buffer tank 3 and the second concentrate buffer tank 4 are vacuum tank, the vacuum
The top of tank is equipped with vacuum breaker valve 21.
Further, the filter core of the filter 17 is woven wire filter core, and the filter diameter of the strainer of the filter 17 is 3
μm。
Further, the top of the vacuum-concentrcted device 1 is equipped with steam inlet, the vacuum-concentrcted device 1
Lower part is equipped with condensation-water drain, and for the feed inlet of the vacuum-concentrcted device 1 close to the steam inlet, the vacuum decompression is dense
The discharge port of contracting device 1 is close to the condensation-water drain.
Further, it is equipped with liquid level in the fluid reservoir 5, the first concentrate buffer tank 3 and the second concentrate buffer tank 4
Meter, each liquid level gauge are separately connected a liquid level display.
The above-mentioned system for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid is used the present invention also provides a kind of
The method for recycling OP-10, specifically includes following steps：
Step 1：After the liquid level in the fluid reservoir 5 reaches 50%, the circulating cooling water valve of the condenser 2 is opened
From the first water pump 16 to the valve vacuum-concentrcted device 1 in door, all valves on third pipeline 10 and first pipe 8
Door starts the vacuum pump set of vacuum-concentrcted device 1, then waits for the pressure reduction extremely -0.05MPa in vacuum-concentrcted device 1
When, the valve on the liquid outlet of fluid reservoir 5 is opened, while starting the second water pump 18, opens the feed liquor of the first concentrate buffer tank 3
Valve on mouth, while it is 1.5~1.7m to adjust the second water pump 18 to flow into the flow rate of liquid of vacuum-concentrcted device 13/ h, connects
It, when the liquid of the first concentrate buffer tank 3 reaches 0.3m3Afterwards, the valve at the steam inlet of vacuum-concentrcted device 1 is opened
Door；
Step 2：After the operation for completing step 1, when the liquid level of the first concentrate buffer tank 3 rises to 30%, first is opened
Valve on discharge nozzle 12 opens the first water pump 16, and the flow rate of liquid for adjusting the first water pump 16 inflow vacuum-concentrcted device 1 is
1.9~2.1m3/ h, meanwhile, it is 1.1~1.3m to adjust the second water pump 18 and flow into the flow rate of liquid of vacuum-concentrcted device 13/h；
Step 3：After the operation for completing step 2, when the liquid level of the first concentrate buffer tank 3 rises to 80%, first is measured
The OP-10 concentration of liquid in concentrate buffer tank 3, when OP-10 concentration reaches 20wt% or more, the first water pump 16 of holding flows into very
The flow rate of liquid of empty decompression concentrator 1 is 1.9~2.1m3/ h, meanwhile, keep the second water pump 18 to flow into vacuum-concentrcted device 1
Flow rate of liquid be 1.1~1.3m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%；When OP-10 concentration is less than
20wt%, then it is 1.0~1.5m to adjust the first water pump 16 and flow into the flow rate of liquid of vacuum-concentrcted device 13/ h, meanwhile, it keeps
The flow rate of liquid that second water pump 18 flows into vacuum-concentrcted device 1 is 1.1~1.3m3/ h, until the first concentrate buffer tank 3
Liquid level is up to 90%；
Step 4：When the liquid level of the first concentrate buffer tank 3 is up to 90%, at the inlet for opening the second concentrate buffer tank 4
Valve to the second concentrate buffer tank 4 pressure and system pressure balance, adjust the first concentrate surge tank inlet
Valve openings and the second concentrate surge tank inlet valve openings to maintain the liquid level of the first concentrate buffer tank 3 to tie up
It keeps steady and determines no longer to rise up to the OP-10 concentration of liquid in the first concentrate buffer tank 3, be then shut off on the first discharge nozzle 12
Valve opens the vacuum breaker valve 21 of the first concentrate buffer tank 3, opens the valve on the second discharge nozzle 13, utilizes the first packet
Liquid is packed in 6 pair of first concentrate buffer tank 3 of vanning.
As can be seen from the above description, the beneficial effects of the present invention are：Can be only 2- by OP-10 concentration using the above method
The solution of 3wt% is concentrated into products of the OP-10 at concentrations up to 20wt%, and traditional method for concentration is only capable of waste liquid being concentrated into
A concentration of 5wt% or less of OP-10.
Embodiment 1
Fig. 1 is please referred to, the system for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, including vacuum decompression
Inspissator 1, condenser 2, the first concentrate buffer tank 3, the second concentrate buffer tank 4 and the fluid reservoir for storing initial waste liquid
5, the first packing case 6, the second packing case 7, first pipe 8, second pipe 9, third pipeline 10 and the 4th pipeline 11；Described first
The liquid outlet of concentrate buffer tank 3 is communicated with the first discharge nozzle 12 and the second discharge nozzle 13, and the second concentrate buffer tank 4 goes out liquid
Mouth is communicated with third discharge nozzle 14 and the 4th discharge nozzle 15；The feed inlet of the vacuum-concentrcted device 1 is divided by first pipe 8
It is not connected to first discharge nozzle 12 and third discharge nozzle 14, the discharge port of the vacuum-concentrcted device 1 passes through the second pipe
Road 9 is connected to the inlet of the inlet of the first concentrate buffer tank 3 and the second concentrate buffer tank 4 respectively；Described
One packing case 6 is connect by the second discharge nozzle 13 with the first concentrate buffer tank 3, and second packing case 7 passes through the 4th
Discharge nozzle 15 is connect with the second concentrate buffer tank 4；The first pipe 8 is equipped with the first water pump 16 and filter 17, described
First water pump 16 is close to the liquid outlet of the first concentrate buffer tank 3, and the filter 17 is close to the vacuum-concentrcted
The feed inlet of device 1；
The liquid outlet of the fluid reservoir 5 passes through the first pipe between third pipeline 10 and the first water pump 16 and filter 17
8 connections, the third pipeline 10 are equipped with the second water pump 18；1 top of the vacuum-concentrcted device is equipped with exhaust outlet, the row
Gas port is connect by the 4th pipeline 11 with the condenser 2；The bottom of the condenser 2 is connected with for accepting the cold of condensate liquid
Lime set receiving tank 19.
The condenser 2 is connected with vacuum generator 20；The first concentrate buffer tank 3 and the second concentrate buffer tank
4 be vacuum tank, and the top of the vacuum tank is equipped with vacuum breaker valve 21；The filter core of the filter 17 is filtered for woven wire
The filter diameter of core, the strainer of the filter 17 is 3 μm；The top of the vacuum-concentrcted device 1 is equipped with steam inlet, described true
The lower part of empty decompression concentrator 1 is equipped with condensation-water drain, the feed inlet of the vacuum-concentrcted device 1 close to the steam into
Mouthful, the discharge port of the vacuum-concentrcted device 1 is close to the condensation-water drain；The fluid reservoir 5, the first concentrate buffer tank
3 and second are equipped with liquid level gauge in concentrate buffer tank 4, and each liquid level gauge is separately connected a liquid level display.
Embodiment 2
Fig. 1 is please referred to, it is useless for recycling polytetrafluoroethylene (PTFE) concentration dispersion liquid using embodiment 1 that the present invention also provides a kind of
The method of the system recycling OP-10 of OP-10, specifically includes following steps in liquid：
Step 1：When the liquid level in the fluid reservoir 5 reaches 50% (15m3) after, open the circulating cooling of the condenser 2
From the first water pump 16 to vacuum-concentrcted device 1 on all valves and first pipe 8 on penstock, third pipeline 10
Valve starts the vacuum pump set of vacuum-concentrcted device 1, then wait for pressure reduction in vacuum-concentrcted device 1 to-
When 0.05MPa, the valve on the liquid outlet of fluid reservoir 5 is opened, while starting the second water pump 18, open the first concentrate buffer tank
Valve on 3 inlet, while it is 1.5m to adjust the second water pump 18 to flow into the flow rate of liquid of vacuum-concentrcted device 13/ h, connects
It, when the liquid of the first concentrate buffer tank 3 reaches 0.3m3Afterwards, at the steam inlet for slowly opening vacuum-concentrcted device 1
Valve avoids evaporating the too fast a large amount of bubbles of generation, and OP-10 enters in vacuum generator；
Step 2：After the operation for completing step 1, ((first and second when the liquid level of the first concentrate buffer tank 3 rises to 30%
The volume of concentrate buffer tank is 1.5m3, the actual volume of the liquid for the tank body that the percentage of liquid level indicates accounts for the molten product of tank body
Percentage, do not make herein especially declare place indicate this meaning)), open the first discharge nozzle 12 on valve, open first
Water pump 16, it is 1.9m to adjust the first water pump 16 and flow into the flow rate of liquid of vacuum-concentrcted device 13/ h, meanwhile, adjust the second water pump
18 flow rate of liquid for flowing into vacuum-concentrcted device 1 are 1.1m3/h；
Step 3：After the operation for completing step 2, when the liquid level of the first concentrate buffer tank 3 rises to 80%, first is measured
The OP-10 concentration of liquid in concentrate buffer tank 3, when OP-10 concentration reaches 20wt% or more, the first water pump 16 of holding flows into very
The flow rate of liquid of empty decompression concentrator 1 is 1.9m3/ h, meanwhile, keep the second water pump 18 to flow into the liquid of vacuum-concentrcted device 1
Flow velocity is 1.1m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%；When OP-10 concentration be less than 20wt%, then adjust
The flow rate of liquid that first water pump 16 flows into vacuum-concentrcted device 1 is 1.0m3/ h, meanwhile, keep the second water pump 18 to flow into vacuum
The flow rate of liquid of decompression concentrator 1 is 1.1m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%；
Step 4：When the liquid level of the first concentrate buffer tank 3 is up to 90%, at the inlet of crack second concentrate buffer tank 4
Valve to the second concentrate buffer tank 4 pressure and system pressure balance, then the second concentrate of standard-sized sheet buffer tank 4 into
Valve at liquid mouth, and adjust the feed liquor of the valve openings and the second concentrate surge tank of the inlet of the first concentrate surge tank
The valve openings of mouth are to maintain the liquid level of the first concentrate buffer tank 3 to maintain to stablize up to liquid in the first concentrate buffer tank 3
OP-10 concentration no longer rise, the inlet of the valve and the first concentrate surge tank 3 that are then shut off on the first discharge nozzle 12
Valve opens the vacuum breaker valve 21 of the first concentrate buffer tank 3, opens the valve on the second discharge nozzle 13, utilizes the first packet
Liquid is packed in 6 pair of first concentrate buffer tank 3 of vanning；
Step 5：When the liquid level of the second concentrate buffer tank 4 reaches 30%, the valve on third discharge nozzle 14 is opened, is adjusted
The flow rate of liquid for saving the first water pump 16 inflow vacuum-concentrcted device 1 is identical as the flow velocity of the first water pump 16 in step 1, adjusts simultaneously
The flow rate of liquid for saving the second water pump 18 inflow vacuum-concentrcted device 1 is identical as the flow velocity of the second water pump in step 1, until second
The liquid level of concentrate buffer tank 4 reaches 90%, then is switched to the first concentration buffer tank 3, and method is the same as step 4, the valve of two tank bodies
Door is opened and closed and is just exchanged.
Measure the OP-10 concentration of recycling product, a concentration of 20wt% of OP-10 of product.
Embodiment 3
Other with embodiment 2, the difference is that,
In step 1, it is 1.7m to adjust the second water pump 18 and flow into the flow rate of liquid of vacuum-concentrcted device 13/h；
The flow rate of liquid that the first water pump of adjusting 16 in step 2 flows into vacuum-concentrcted device 1 is 2.1m3/ h, meanwhile, it adjusts
It is 1.3m to save the second water pump 18 and flow into the flow rate of liquid of vacuum-concentrcted device 13/h；
Step 3：After the operation for completing step 2, when the liquid level of the first concentrate buffer tank 3 rises to 80%, first is measured
The OP-10 concentration of liquid in concentrate buffer tank 3, when OP-10 concentration reaches 20wt% or more, the first water pump 16 of holding flows into very
The flow rate of liquid of empty decompression concentrator 1 is 2.1m3/ h, meanwhile, keep the second water pump 18 to flow into the liquid of vacuum-concentrcted device 1
Flow velocity is 1.3m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%；When OP-10 concentration be less than 20wt%, then adjust
The flow rate of liquid that first water pump 16 flows into vacuum-concentrcted device 1 is 1.5m3/ h, meanwhile, keep the second water pump 18 to flow into vacuum
The flow rate of liquid of decompression concentrator 1 is 1.3m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%.
Measure the OP-10 concentration of recycling product, a concentration of 22wt% of OP-10 of product.
Embodiment 4
Other with embodiment 2, the difference is that,
In step 1, it is 1.6m to adjust the second water pump 18 and flow into the flow rate of liquid of vacuum-concentrcted device 13/h；
In step 2, it is 2.0m to adjust the first water pump 16 and flow into the flow rate of liquid of vacuum-concentrcted device 13/ h, meanwhile, it adjusts
It is 1.2m to save the second water pump 18 and flow into the flow rate of liquid of vacuum-concentrcted device 13/h；
Step 3：After the operation for completing step 2, when the liquid level of the first concentrate buffer tank 3 rises to 80%, first is measured
The OP-10 concentration of liquid in concentrate buffer tank 3, when OP-10 concentration reaches 20wt% or more, the first water pump 16 of holding flows into very
The flow rate of liquid of empty decompression concentrator 1 is 2.0m3/ h, meanwhile, keep the second water pump 18 to flow into the liquid of vacuum-concentrcted device 1
Flow velocity is 1.2m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%；When OP-10 concentration be less than 20wt%, then adjust
The flow rate of liquid that first water pump 16 flows into vacuum-concentrcted device 1 is 1.3m3/ h, meanwhile, keep the second water pump 18 to flow into vacuum
The flow rate of liquid of decompression concentrator 1 is 1.2m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%.
Measure the OP-10 concentration of recycling product, a concentration of 25wt% of OP-10 of product.
Comparative example 1
It is concentrated using conventional normal pressure method for concentration, measures the OP-10 concentration of recycling product, the OP-10 of product is dense
Degree is 4.5wt%.
Comparative example 2
Other with embodiment 2, the difference is that,
In step 1, it is 1.6m to adjust the second water pump 18 and flow into the flow rate of liquid of vacuum-concentrcted device 13/h；
In step 2, it is 2.0m to adjust the first water pump 16 and flow into the flow rate of liquid of vacuum-concentrcted device 13/ h, meanwhile, it adjusts
It is 1.6m to save the second water pump 18 and flow into the flow rate of liquid of vacuum-concentrcted device 13/h；
Step 3：After the operation for completing step 2, when the liquid level of the first concentrate buffer tank 3 rises to 80%, first is measured
The OP-10 concentration of liquid in concentrate buffer tank 3, when OP-10 concentration reaches 20wt% or more, the first water pump 16 of holding flows into very
The flow rate of liquid of empty decompression concentrator 1 is 2.0m3/ h, meanwhile, keep the second water pump 18 to flow into the liquid of vacuum-concentrcted device 1
Flow velocity is 1.6m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%；When OP-10 concentration be less than 20wt%, then adjust
The flow rate of liquid that first water pump 16 flows into vacuum-concentrcted device 1 is 1.6m3/ h, meanwhile, keep the second water pump 18 to flow into vacuum
The flow rate of liquid of decompression concentrator 1 is 1.6m3/ h, until the liquid level of the first concentrate buffer tank 3 is up to 90%.
Measure the OP-10 concentration of recycling product, a concentration of 5wt% of OP-10 of product.
The OP-10 concentration of the product recycled from comparative example 1 and comparative example 2 with the present invention can be seen that the present invention can be to poly-
OP-10 is effectively recycled in tetrafluoroethene concentration dispersion liquid waste liquid.
In conclusion provided by the present invention for recycling polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid in OP-10 system and
Method makes waste liquid (solution of low concentration OP-10) form one layer of liquid film on tubulation using vacuum-concentrcted device, to big
Its foaminess of amplitude reduction, moisture vaporize efficiently the OP-10 solution of low concentration being condensed into high concentration OP-10 molten
Liquid can concentrate polytetrafluoroethylene (PTFE) the effective concentration and recovery of OP-10 progress in dispersion liquid waste liquid and utilize again, increase economic effect
Benefit, meanwhile, mitigate the OP-10 concentration in relief liquor, mitigates environmental pollution, it is more environmentally-friendly；It is slow that first and second concentrate is set simultaneously
Tank is deposited, two tank body switchings use so that entire concentration process can be uninterrupted, improves organic efficiency；Using the above method, energy
The solution that OP-10 concentration is only 2-3wt% is concentrated into products of the OP-10 at concentrations up to 20wt%, and traditional method for concentration
It is only capable of waste liquid being concentrated into a concentration of 5wt% or less of OP-10.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (7)
1. a kind of system for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, which is characterized in that subtract including vacuum
Pressure inspissator, condenser, the first concentrate buffer tank, the second concentrate buffer tank and for store initial waste liquid fluid reservoir,
First packing case, the second packing case, first pipe, second pipe, third pipeline and the 4th pipeline；
The liquid outlet of the first concentrate buffer tank is communicated with the first discharge nozzle and the second discharge nozzle, the second concentrate buffer tank
Liquid outlet be communicated with third discharge nozzle and the 4th discharge nozzle；
The feed inlet of the vacuum-concentrcted device is connected with first discharge nozzle and third discharge nozzle respectively by first pipe
It is logical, the discharge port of the vacuum-concentrcted device by second pipe respectively with the inlet of the first concentrate buffer tank and
The inlet of second concentrate buffer tank is connected to；First packing case is cached by the second discharge nozzle and first concentrate
Tank connects, and second packing case is connect by the 4th discharge nozzle with the second concentrate buffer tank；The first pipe is equipped with
First water pump and filter, for first water pump close to the liquid outlet of the first concentrate buffer tank, the filter is close
The feed inlet of the vacuum-concentrcted device；
The liquid outlet of the fluid reservoir is connected to by the first pipe between third pipeline and the first water pump and filter, and described
Three pipelines are equipped with the second water pump；
Exhaust outlet is equipped at the top of the vacuum-concentrcted device, the exhaust outlet is connect by the 4th pipeline with the condenser；
The bottom of the condenser is connected with the condensate liquid receiving tank for accepting condensate liquid.
2. the system according to claim 1 for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, feature
It is, the condenser is connected with vacuum generator.
3. the system according to claim 1 for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, feature
It is, the first concentrate buffer tank and the second concentrate buffer tank are vacuum tank, and the top of the vacuum tank, which is equipped with, breaks
Vacuum valve.
4. the system according to claim 1 for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, feature
It is, the filter core of the filter is woven wire filter core, and the filter diameter of the strainer of the filter is 3 μm.
5. the system according to claim 1 for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, feature
It is, the top of the vacuum-concentrcted device is equipped with steam inlet, and the lower part of the vacuum-concentrcted device is equipped with condensed water
Outlet, close to the steam inlet, the discharge port of the vacuum-concentrcted device leans on the feed inlet of the vacuum-concentrcted device
The nearly condensation-water drain.
6. the system according to claim 1 for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, feature
It is, liquid level gauge, each liquid level score is equipped in the fluid reservoir, the first concentrate buffer tank and the second concentrate buffer tank
It Lian Jie not a liquid level display.
7. a kind of method for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid, which is characterized in that including the right to use
Profit requires the system for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid described in 1~6 any one, specifically includes
Following steps：
Step 1：After the liquid level in the fluid reservoir reaches 50%, the circulating cooling penstock of the condenser is opened, is started
The vacuum-concentrcted device opens fluid reservoir then when the pressure reduction in vacuum-concentrcted device is to -0.05MPa
Valve on liquid outlet, while starting the second water pump, the valve on the inlet of the first concentrate buffer tank is opened, is adjusted simultaneously
The flow rate of liquid that second water pump flows into vacuum-concentrcted device is 1.5~1.7m3/ h, then, when the first concentrate buffer tank
Liquid reaches 0.3m3Afterwards, the valve at the steam inlet of vacuum-concentrcted device is opened；
Step 2：After the operation for completing step 1, when the liquid level of the first concentrate buffer tank rises to 30%, the first discharge nozzle is opened
On valve, open the first water pump, adjust the first water pump flow into vacuum-concentrcted device flow rate of liquid be 1.9~2.1m3/ h,
Meanwhile it is 1.1~1.3m to adjust the second water pump to flow into the flow rate of liquid of vacuum-concentrcted device3/h；
Step 3：After the operation for completing step 2, when the liquid level of the first concentrate buffer tank rises to 80%, it is slow to measure the first concentration
The OP-10 concentration for depositing pot liquid, when OP-10 concentration reaches 20wt% or more, the first water pump of holding flows into vacuum-concentrcted
The flow rate of liquid of device is 1.9~2.1m3/ h, meanwhile, it is 1.1 to keep the second water pump to flow into the flow rate of liquid of vacuum-concentrcted device
~1.3m3/ h, until the liquid level of the first concentrate buffer tank is up to 90%；When OP-10 concentration be less than 20wt%, then adjust the first water
The flow rate of liquid that pump flows into vacuum-concentrcted device is 1.0~1.5m3/ h, meanwhile, keep the second water pump to flow into vacuum decompression dense
The flow rate of liquid of contracting device is 1.1~1.3m3/ h, until the liquid level of the first concentrate buffer tank is up to 90%；
Step 4：When the liquid level of the first concentrate buffer tank is up to 90%, the valve at the inlet of the second concentrate buffer tank is opened
To the pressure balance of the pressure and system of the second concentrate buffer tank, the valve for adjusting the inlet of the first concentrate surge tank is opened
The valve openings of the inlet of mouth and the second concentrate surge tank are to maintain the liquid level of the first concentrate buffer tank to maintain to stablize directly
OP-10 concentration to the first concentration caching pot liquid no longer rises, and the valve being then shut off on the first discharge nozzle opens first
The vacuum breaker valve of concentrate buffer tank opens the valve on the second discharge nozzle, is concentrated and is cached using the first packing case pair first
Pot liquid is packed.
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| CN201810238231.4A CN108569739B (en) | 2018-03-22 | 2018-03-22 | System and method for recovering OP-10 in polytetrafluoroethylene concentrated dispersion liquid waste liquid |
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| CN201810238231.4A CN108569739B (en) | 2018-03-22 | 2018-03-22 | System and method for recovering OP-10 in polytetrafluoroethylene concentrated dispersion liquid waste liquid |
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Denomination of invention: System and method for recovering OP-10 from waste liquid of polytetrafluoroethylene concentrated dispersion Effective date of registration: 20230925 Granted publication date: 20210514 Pledgee: Industrial and Commercial Bank of China Limited Sanming Sanyuan Branch Pledgor: FUJIAN SANNONG NEW MATERIALS CO.,LTD. Registration number: Y2023980058306 |
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