CN220657100U - Useless PTMEG solution recovery unit - Google Patents
Useless PTMEG solution recovery unit Download PDFInfo
- Publication number
- CN220657100U CN220657100U CN202420318244.3U CN202420318244U CN220657100U CN 220657100 U CN220657100 U CN 220657100U CN 202420318244 U CN202420318244 U CN 202420318244U CN 220657100 U CN220657100 U CN 220657100U
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- Prior art keywords
- liquid
- ptmeg
- waste
- valve
- liquid collecting
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- 229920000909 polytetrahydrofuran Polymers 0.000 title claims abstract description 91
- 238000011084 recovery Methods 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 158
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000002699 waste material Substances 0.000 claims abstract description 83
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 51
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 238000007363 ring formation reaction Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 7
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- -1 and simultaneously Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
The utility model discloses a waste PTMEG solution recovery device, which comprises a liquid collecting funnel, wherein a liquid outlet of the liquid collecting funnel is connected with a liquid inlet of a liquid collecting tank through a pipeline, the liquid outlet of the liquid collecting tank is connected with a liquid inlet of a pneumatic diaphragm pump through a pipeline, and the liquid outlet of the pneumatic diaphragm pump is connected with a middle liquid inlet of a waste PTMEG storage tank through a pipeline; the liquid inlet of the pneumatic diaphragm pump is also connected with a metal hose, and a blind plate is arranged at the end part of the metal hose; the air inlet of the pneumatic diaphragm pump is connected with a nitrogen pipe, and the nitrogen pipe is also connected with the middle air inlet of the liquid collecting tank. The waste PTMEG solution contained in the small barrel and the large barrel is recovered respectively in two modes, so that waste of the waste PTMEG solution caused by incineration is avoided, and the production carbon emission is reduced; and the recovered waste PTMEG solution is sent to a waste PTMEG storage tank to be mixed with the waste PTMEG solution generated by the system, so that the temperature of the waste PTMEG solution is increased, and the pipeline blockage caused by PTMEG condensation is prevented.
Description
Technical Field
The utility model relates to the field of waste liquid treatment, in particular to a waste PTMEG solution recovery device.
Background
BDO,1,4 butanediol, also known as 1, 4-dihydroxybutane, is an important organic and fine chemical raw material which can be used for the production of THF (tetrahydrofuran) which can be polymerized by ring opening to form PTMEG (polytetrahydrofuran), which is used mainly as a soft segment for block polyurethanes or block polyether polyesters.
In practical production facilities, the PTMEG facility is divided into a THF framework and a PTMEG framework; the total of 2 sections of the THF frame are respectively a cyclization section and a refining section, the main function of the cyclization section is to react with BDO as a raw material under the catalysis of ion exchange resin to generate crude THF, and simultaneously, waste PTMEG from a tank area is recovered and depolymerized; the PTMEG frame has 4 working sections, a large number of samples are required to be taken for analyzing indexes of products in the production process, the waste PTMEG solution generated in the current treatment sampling and production processes is usually discharged into a waste liquid collecting tank for incineration, a torch system is far away from the waste liquid collecting tank, the melting point of PTMEG is 33-36 ℃, and after PTMEG waste liquid is discharged into the waste liquid collecting system, pipeline blockage is often caused in winter, normal operation of the production system is influenced, and workers need to ascend to treat the pipeline blockage to cause potential safety risks.
Disclosure of Invention
The utility model aims to provide a waste PTMEG solution recovery device.
The utility model is implemented by the following technical scheme:
the waste PTMEG solution recovery device comprises a waste PTMEG storage tank, wherein a top liquid inlet of the waste PTMEG storage tank is connected with a waste PTMEG pipe, a liquid outlet of the waste PTMEG storage tank is connected with a liquid inlet of a conveying pump through a pipeline, a liquid outlet of the conveying pump is connected with a liquid inlet of a cyclization working section of the PTMEG device through a pipeline, the waste PTMEG solution recovery device further comprises a liquid collecting funnel, a liquid outlet of the liquid collecting funnel is connected with a liquid inlet of a liquid collecting tank through a pipeline, a liquid outlet of the liquid collecting tank is connected with a liquid inlet of a pneumatic diaphragm pump through a pipeline, and a liquid outlet of the pneumatic diaphragm pump is connected with a middle liquid inlet of the waste PTMEG storage tank through a pipeline; the liquid inlet of the pneumatic diaphragm pump is also connected with a metal hose, and a blind plate is arranged at the end part of the metal hose; the air inlet of the pneumatic diaphragm pump is connected with a nitrogen pipe, and the nitrogen pipe is also connected with the air inlet in the middle of the liquid collecting tank;
the device is characterized in that a liquid collecting valve is arranged on a pipeline between the liquid collecting funnel and the liquid collecting tank, a liquid collecting tank liquid discharging valve is arranged on a pipeline between the liquid collecting tank and the pneumatic diaphragm pump, a nitrogen valve is arranged on the nitrogen pipe, a nitrogen supplementing valve is arranged between the nitrogen pipe and the liquid collecting tank, a recovery valve is arranged on the pneumatic diaphragm pump outlet, and a large barrel liquid discharging valve is arranged on the metal hose.
Preferably, the liquid collecting tank liquid discharging valve, the recovery valve, the nitrogen supplementing valve and the liquid collecting valve are all electromagnetic valves, a liquid level meter is arranged in the liquid collecting tank, a pressure gauge is arranged between the pneumatic diaphragm pump and the recovery valve, a signal output end of the liquid level meter and the pressure gauge is electrically connected with a signal input end of a controller, and a signal output end of the controller is electrically connected with the liquid collecting tank liquid discharging valve, the recovery valve, the nitrogen supplementing valve and a signal input end of the liquid collecting valve.
Preferably, a cover body is arranged at the top of the liquid collecting funnel, and a filter screen is arranged in the liquid collecting funnel.
Preferably, an overflow valve and a check valve are further installed between the nitrogen pipe and the liquid collection tank.
Preferably, the liquid outlet of the delivery pump is also connected with the middle liquid inlet of the waste PTMEG storage tank through a pipeline, and a circulating valve is arranged on the pipeline between the delivery pump and the waste PTMEG storage tank.
The utility model has the advantages that: the waste PTMEG solution contained in the small barrel and the large barrel is recovered respectively in two modes, so that waste of the waste PTMEG solution caused by incineration is avoided, and the production carbon emission is reduced; and the recovered waste PTMEG solution is sent into a waste PTMEG storage tank to be mixed with the waste PTMEG solution generated by the system, so that the temperature of the waste PTMEG solution is increased, the pipeline blockage caused by PTMEG condensation is prevented, and the normal operation of the production system is ensured.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic diagram of a control circuit for automatic recovery of the liquid collection tank.
In the figure: waste PTMEG storage tank 1, waste PTMEG pipe 2, delivery pump 3, liquid collecting funnel 4, liquid collecting tank 5, pneumatic diaphragm pump 6, metal hose 7, blind plate 8, nitrogen pipe 9, liquid collecting valve 10, liquid collecting tank drain valve 11, nitrogen valve 12, nitrogen make-up valve 13, recovery valve 14, vat drain valve 15, liquid level gauge 16, pressure gauge 17, controller 18, cover 19, filter screen 20, overflow valve 21, check valve 22, and circulation valve 23.
Detailed Description
Example 1:
as shown in fig. 1, the waste PTMEG solution recovery device comprises a waste PTMEG storage tank 1, wherein a top liquid inlet of the waste PTMEG storage tank 1 is connected with a waste PTMEG pipe 2, a liquid outlet of the waste PTMEG storage tank 1 is connected with a liquid inlet of a delivery pump 3 through a pipeline, a liquid outlet of the delivery pump 3 is connected with a liquid inlet of a cyclization working section of the PTMEG device through a pipeline, the waste PTMEG solution recovery device further comprises a liquid collecting funnel 4, a liquid outlet of the liquid collecting funnel 4 is connected with a liquid inlet of a liquid collecting tank 5 through a pipeline, a liquid outlet of the liquid collecting tank 5 is connected with a liquid inlet of a pneumatic diaphragm pump 6 through a pipeline, and a liquid outlet of the pneumatic diaphragm pump 6 is connected with a middle liquid inlet of the waste PTMEG storage tank 1 through a pipeline; the liquid inlet of the pneumatic diaphragm pump 6 is also connected with a metal hose 7, and a blind plate 8 is arranged at the end part of the metal hose 7; the air inlet of the pneumatic diaphragm pump 6 is connected with a nitrogen pipe 9, and the nitrogen pipe 9 is also connected with the middle air inlet of the liquid collecting tank 5.
A liquid collecting valve 10 is arranged on a pipeline between the liquid collecting funnel 4 and the liquid collecting tank 5, a liquid collecting tank liquid discharging valve 11 is arranged on a pipeline between the liquid collecting tank 5 and the pneumatic diaphragm pump 6, a nitrogen valve 12 is arranged on the nitrogen pipe 9, a nitrogen supplementing valve 13 is arranged between the nitrogen pipe 9 and the liquid collecting tank 5, a recovery valve 14 is arranged at an outlet of the pneumatic diaphragm pump 6, and a vat liquid discharging valve 15 is arranged on the metal hose 7.
When the device is used, the device is divided into two cases according to the size of a container for containing waste PTMEG, namely a small barrel containing case and a large barrel containing case, and the following descriptions are respectively carried out according to the two cases: when the small barrel is used for containing waste PTMEG solution, as the small barrel is convenient to carry and pour, the liquid collecting valve 10 is opened, the solution is poured into the liquid collecting funnel 4, the waste PTMEG solution in the liquid collecting funnel 4 flows into the liquid collecting tank 5, the liquid collecting tank 5 has a heating effect, an interlayer can be arranged for heating through electric heat or steam heating, the liquid level in the liquid collecting tank 5 reaches about 80%, the liquid collecting funnel 4 is closed, the liquid collecting tank liquid discharging valve 11, the recovery valve 14, the nitrogen valve 12 and the nitrogen supplementing valve 13 are opened, and after the nitrogen valve 12 is opened, nitrogen is used for providing the working air pressure of the pneumatic diaphragm pump 6, so that the waste PTMEG solution in the liquid collecting tank 5 is pumped into the waste PTMEG storage tank 1 by the pneumatic diaphragm pump 6; after the nitrogen supplementing valve 13 is opened, nitrogen can fill the liquid collecting tank 5, so that negative pressure in the liquid collecting tank 5 can be avoided under the action of the pneumatic diaphragm pump 6, and the waste PTMEG solution in the liquid collecting tank 5 is completely discharged; when the vat is processed to contain the waste PTMEG solution, the blind plate 8 on the metal hose 7 is removed, the vat drain valve 15, the nitrogen pipe 9 and the recovery valve 14 are opened, the end of the metal hose 7 is placed in the vat, and nitrogen is used for providing the working air pressure of the pneumatic diaphragm pump 6, so that the waste PTMEG solution in the vat is pumped into the waste PTMEG storage tank 1 by the pneumatic diaphragm pump 6.
The waste PTMEG solution pumped into the waste PTMEG storage tank 1 is mixed with the waste PTMEG solution fed by the waste PTMEG pipe 2, and the waste PTMEG pipe 2 is connected with a production system of a PTMEG frame, so that the temperature is higher, and the temperature of the partially recovered waste PTMEG solution can be raised; the waste PTMEG solution in the waste PTMEG storage tank 1 is sent to a cyclization section for recycling through a delivery pump 3.
The top of the liquid collecting funnel 4 is provided with a cover 19, and the cover 19 can prevent impurities and dust from entering the device when the impurities and dust are not recovered; a filter screen 20 is arranged in the liquid collecting funnel 4, and the filter screen 20 can filter the condensation substances or impurities with larger volume, so as to avoid the blockage of a pipeline or a valve.
An overflow valve 21 and a check valve 22 are also arranged between the nitrogen pipe 9 and the liquid collecting tank 5, the overflow valve 21 can reduce the pressure of nitrogen fed into the liquid collecting tank 5, and the check valve 22 can prevent the solution or gas of the liquid collecting tank 5 from reversely bouncing into the nitrogen pipe 9 so as to prevent the pneumatic diaphragm pump 6 from being damaged.
The liquid outlet of the delivery pump 3 is also connected with the middle liquid inlet of the waste PTMEG storage tank 1 through a pipeline, a circulating valve 23 is arranged on the pipeline between the delivery pump 3 and the waste PTMEG storage tank 1, the circulating valve 23 is closed when the waste PTMEG storage tank 1 is required to be circulated when the waste PTMEG storage tank 1 is conveyed to the cyclization section, the valve which is conveyed to the cyclization section is closed, and the circulating valve 23 is opened for circulation.
Example 2:
as shown in fig. 1 and 2, the waste PTMEG solution recovery device has a similar structure to that of the embodiment 1, except that the liquid tank drain valve 11, the recovery valve 14, the nitrogen valve 12, the nitrogen replenishment valve 13 and the liquid collection valve 10 are all solenoid valves, a liquid level meter 16 is installed in the liquid collection tank 5, a pressure gauge 17 is installed between the pneumatic diaphragm pump 6 and the recovery valve 14, the signal output ends of the liquid level meter 16 and the pressure gauge 17 are electrically connected with the signal input end of a controller 18, and the signal output end of the controller 18 is electrically connected with the signal input ends of the liquid tank drain valve 11, the recovery valve 14, the nitrogen valve 12, the nitrogen replenishment valve 13 and the liquid collection valve 10.
In the embodiment, the automatic recovery process is mainly performed when the small barrel is filled with the waste PTMEG solution, in the process that the waste PTMEG solution in the liquid collecting funnel 4 flows into the liquid collecting tank 5, the liquid collecting tank drain valve 11, the recovery valve 14, the nitrogen valve 12 and the nitrogen supplementing valve 13 are in a closed state, the liquid collecting valve 10 is in an open state, the liquid level meter 16 is used for detecting the liquid level of the waste PTMEG solution in the liquid collecting tank 5 and sending a signal to the controller 18, when the liquid level of the liquid collecting tank 5 reaches 80%, the controller 18 controls the liquid collecting tank drain valve 11, the recovery valve 14, the nitrogen valve 12 and the nitrogen supplementing valve 13 to be opened, the liquid collecting valve 10 is closed, and the nitrogen is used for providing the working air pressure of the pneumatic diaphragm pump 6, so that the waste PTMEG solution in the liquid collecting tank 5 is pumped into the waste PTMEG storage tank 1 by the pneumatic diaphragm pump 6; the pressure gauge 17 is used for detecting the outlet pressure of the pneumatic diaphragm pump 6 and sending a signal to the controller 18, when the outlet of the pneumatic diaphragm pump 6 is out of pressure, i.e. no waste PTMEG solution in the liquid collecting tank 5 is pumped out, the controller 18 controls the liquid collecting tank liquid discharging valve 11, the recovery valve 14, the nitrogen valve 12 and the nitrogen supplementing valve 13 to be closed, and the liquid collecting valve 10 to be opened; the automatic recovery of the waste PTMEG solution contained in the small barrel is carried out.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The waste PTMEG solution recovery device comprises a waste PTMEG storage tank, wherein a top liquid inlet of the waste PTMEG storage tank is connected with a waste PTMEG pipe, a liquid outlet of the waste PTMEG storage tank is connected with a liquid inlet of a conveying pump through a pipeline, and a liquid outlet of the conveying pump is connected with a liquid inlet of a cyclization working section of the PTMEG device through a pipeline; the liquid inlet of the pneumatic diaphragm pump is also connected with a metal hose, and a blind plate is arranged at the end part of the metal hose; the air inlet of the pneumatic diaphragm pump is connected with a nitrogen pipe, and the nitrogen pipe is also connected with the air inlet in the middle of the liquid collecting tank;
the device is characterized in that a liquid collecting valve is arranged on a pipeline between the liquid collecting funnel and the liquid collecting tank, a liquid collecting tank liquid discharging valve is arranged on a pipeline between the liquid collecting tank and the pneumatic diaphragm pump, a nitrogen valve is arranged on the nitrogen pipe, a nitrogen supplementing valve is arranged between the nitrogen pipe and the liquid collecting tank, a recovery valve is arranged on the pneumatic diaphragm pump outlet, and a large barrel liquid discharging valve is arranged on the metal hose.
2. The waste PTMEG solution recovery device according to claim 1, wherein the liquid collection tank drain valve, the recovery valve, the nitrogen replenishment valve and the liquid collection valve are all solenoid valves, a liquid level meter is installed in the liquid collection tank, a pressure gauge is installed between the pneumatic diaphragm pump and the recovery valve, a signal output end of the liquid level meter and the pressure gauge is electrically connected with a signal input end of a controller, and a signal output end of the controller is electrically connected with the liquid collection tank drain valve, the recovery valve, the nitrogen replenishment valve and the signal input end of the liquid collection valve.
3. The waste PTMEG solution recovery device according to claim 1 or 2, wherein a cover is provided on top of the liquid collection funnel, and a filter screen is installed in the liquid collection funnel.
4. The apparatus for recovering a PTMEG solution from waste according to claim 1 or 2, wherein an overflow valve and a check valve are further installed between the nitrogen pipe and the liquid collection tank.
5. The waste PTMEG solution recovery device according to claim 1 or 2, wherein the liquid outlet of the transfer pump is further connected to the middle liquid inlet of the waste PTMEG storage tank through a pipe, and a circulation valve is installed on the pipe between the transfer pump and the waste PTMEG storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420318244.3U CN220657100U (en) | 2024-02-21 | 2024-02-21 | Useless PTMEG solution recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420318244.3U CN220657100U (en) | 2024-02-21 | 2024-02-21 | Useless PTMEG solution recovery unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220657100U true CN220657100U (en) | 2024-03-26 |
Family
ID=90342857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420318244.3U Active CN220657100U (en) | 2024-02-21 | 2024-02-21 | Useless PTMEG solution recovery unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220657100U (en) |
-
2024
- 2024-02-21 CN CN202420318244.3U patent/CN220657100U/en active Active
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