CN209128047U - Glauber's salt hot melt recycle system - Google Patents
Glauber's salt hot melt recycle system Download PDFInfo
- Publication number
- CN209128047U CN209128047U CN201821338426.8U CN201821338426U CN209128047U CN 209128047 U CN209128047 U CN 209128047U CN 201821338426 U CN201821338426 U CN 201821338426U CN 209128047 U CN209128047 U CN 209128047U
- Authority
- CN
- China
- Prior art keywords
- bucket
- feed inlet
- evaporator
- discharge port
- thawing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000012943 hotmelt Substances 0.000 title abstract description 3
- 239000010446 mirabilite Substances 0.000 title abstract 2
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 title abstract 2
- 239000007788 liquid Substances 0.000 claims abstract description 38
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 64
- 238000002844 melting Methods 0.000 claims description 53
- 230000008018 melting Effects 0.000 claims description 53
- 238000010257 thawing Methods 0.000 claims description 53
- 238000004064 recycling Methods 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims 1
- 239000000155 melt Substances 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 15
- 235000011152 sodium sulphate Nutrition 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 208000021760 high fever Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Freezing, Cooling And Drying Of Foods (AREA)
Abstract
The utility model relates to a glauber's salt hot melt recycle system, evaporimeter, heater, hydrocyclone and centrifuge, melt bucket one, melt bucket two and vapour and liquid separator, the discharge gate that melts bucket one is connected with the first feed inlet that melts bucket two, the feed inlet that melts bucket one is connected with the first discharge gate that melts the two buckets, the second feed inlet that melts bucket two is connected with the discharge gate of evaporimeter, and third feed inlet and hydrocyclone's exit linkage, fourth feed inlet are connected with centrifuge's discharge gate, the second discharge gate that melts bucket two is connected with the feed inlet of evaporimeter, and the third discharge gate is connected with hydrocyclone's feed inlet, hydrocyclone's discharge gate and centrifuge's feed inlet are connected, the exit linkage heater of evaporimeter, the exit linkage vapour and liquid separator of heater. The utility model discloses not only can retrieve evaporimeter secondary steam betterly, but also can avoid system's equipment to receive the restriction in space, have advantages such as the energy consumption is low, economic benefits is better.
Description
Technical field
The utility model relates to inorganic salts dehydration by evaporation fields, relate in particular to a kind of saltcake hot melting recycling utilization system
System.
Background technique
Viscose fiber production process can generate by-product sodium sulphate, while generate a large amount of water, for deployed acid bath solution
It needs to come out in the water of generation and sodium sulphate evaporative crystallization, then configures technique Hao Qu spinning workshop section.
Chinese patent publication No. " CN106745092A " discloses saltcake in a kind of viscose fiber acid bath system, and to produce member bright
The processing unit and method of powder, wherein processing unit includes crystallizing evaporator, heater, melting bucket, brine pump, forced circulation
Pump, centrifuge and flash tank；Centrifuge connects the crystallizing evaporator, connects the heating in the outlet of crystallizing evaporator
The outlet of device, heater connects the flash tank；Forced circulation pump is arranged in the connecting pipe of crystallizing evaporator and heater,
The first outlet of movable flow device is connect with the centrifuge, and the second outlet of movable flow device is connect with the second entrance of melting bucket.This is specially
The anhydrous sodium sulphate yield of benefit can reach 15t/h, steam consumption 2400kg/t(anhydrous sodium sulphate), it is bright to generate secondary steam 1425kg/t(member
Powder) it is completely used in flash distillation plant, thus a large amount of steam have been saved, economic benefit is obvious.But the patent is when in use, will melt
Melt the saltcake liquid outlet that bucket is mounted on a device, but when being limited by place, to complete this operation very difficulty, consumption
When effort.
Summary of the invention
Utility model aims to solve the above-mentioned problems in the prior art, provide a kind of saltcake hot melting recycling
Utilize system.The utility model can not only preferably recycle evaporator secondary steam, but also be avoided that system equipment by
The limitation in space has many advantages, such as that low energy consumption, economic benefit is more preferable.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of saltcake hot melting recycling utilizes system, including evaporator, heater, movable flow device and centrifuge, it is characterised in that:
It further include melting bucket one, melting bucket two and gas-liquid separator, the discharge port for melting bucket one and the first charging for melting bucket two
Mouth connection, the feed inlet for melting bucket one are connect with the first discharge port for melting two barrels, and the second of the thawing bucket two feeds
Mouth is connect with the discharge port of evaporator, the outlet connection of third feed inlet and movable flow device, the discharging of the 4th feed inlet and centrifuge
The feed inlet of mouth connection, second discharge port for melting bucket two and evaporator connects, the charging of third discharge port and movable flow device
Mouth connection, the discharge port of the movable flow device and the feed inlet of centrifuge connect, and the outlet of the evaporator connects heater, described
The outlet of heater connects gas-liquid separator.
One feed inlet of thawing bucket is connected with saltcake centrifuge.
The thawing bucket one and thawing bucket two are provided with PH and adjust inlet.
The thawing bucket two is connected with cooling device by exhaust pipe.
The cooling device is connected with blower.
Pump one is provided on the pipeline melted between bucket one and thawing bucket two.
It is provided with pump three in the connecting pipe of the feed inlet of second discharge port for melting bucket two and evaporator, third goes out
Pump four is provided in the connecting pipe of the feed inlet of material mouth and movable flow device.
Pump two is provided in the connecting pipe of the evaporator and heater.
Secondary steam outlet is provided on the evaporator and gas-liquid separator.
Using utility model has the advantages that
One, in the utility model, setting melts bucket one and melts bucket two, forms a circulation, can will melt bucket always
Connect the saltcake outlet that saltcake centrifuge is set；If only one melts bucket two, bucket two will be melted and be set up directly on saltcake
The outlet of centrifuge will receive the limitation in space, leads to not realize or realize very difficulty, wastes a large amount of manpower object
Power；Setting reduces influence of the space environment for installation equipment, is not influenced by original blanking point, had there are two bucket is melted
There is good economic serviceability.
Two, in the utility model, melt bucket one and thawing bucket two is provided with PH and adjusts inlet, automatically adjust PH, drop
Influence of the low material to system equipment reduces the influence to system equipment.
Three, in the utility model, the thawing bucket two is connected with cooling device by exhaust pipe, melts bucket two by drop
Warm device detaches gas, reduces influence of the system to environment.
Four, in the utility model, the cooling device is connected with blower, and blower is used cooperatively with cooling device.
Five, in the utility model, melt and be provided with pump one on the pipeline between bucket one and thawing bucket two, make to melt bucket one
A circulatory system is formed with bucket two is melted, the saturation anhydrous sodium sulphate feed liquid pump for melting high fever in bucket two is delivered to thawing bucket
The saltcake of saltcake centrifuge output is dissolved on one top, and the feed liquid after thawing enters the thawing bucket one, then is transmitted back to thawing through pump
Bucket two.
Six, in the utility model, in the connecting pipe of the feed inlet of second discharge port for melting bucket two and evaporator
It is provided with pump three, feed liquid in bucket two will be melted and be delivered to the evaporator, between evaporator and heater, heating evaporation crystallization,
It controls level stability and overflows back the thawing bucket B from the liquid outlet；Melt the feed inlet of bucket two third discharge port and movable flow device
Connecting pipe on be provided with pump four, the saturation anhydrous sodium sulphate liquid melted in bucket is delivered to movable flow device, after enrichment with centrifuge into
Row separation anhydrous sodium sulphate, obtains purity and whiteness is higher, aqueous lower anhydrous sodium sulphate material；
Seven, in the utility model, it is provided with secondary steam outlet on the evaporator and gas-liquid separator, steam is returned
It receives and utilizes.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Figure label are as follows: 1, thawing bucket one, 2, thawing bucket two, 3, evaporator, 4, heater, 5, gas-liquid separator, 6, rotation
Liquid device, 7, centrifuge, 8, blower, 9, cooling device, 10, saltcake centrifuge, 11, PH adjust inlet, 12, heating steam into
Mouthful, 13, secondary steam outlet, 14, water outlet, 15, anhydrous sodium sulphate discharge port, 16, pump one, 17, pump two, 18, pump three, 19, pump four.
Specific embodiment
Embodiment 1
A kind of saltcake hot melting recycling utilizes system, including evaporator 3, heater 4, movable flow device 6 and centrifuge 7, further includes
Melt bucket 1, melt bucket 22 and gas-liquid separator 5, the discharge port for melting bucket 1 and the first charging aperture for melting bucket 22
Connection, the feed inlet for melting bucket 1 are connect with the first discharge port for melting two barrels, second charging for melting bucket 22
Mouth is connect with the discharge port of evaporator 3, and third feed inlet is connect with the outlet of movable flow device 6, and the 4th feed inlet goes out with centrifuge 7
Material mouth connection, second discharge port for melting bucket 22 are connect with the feed inlet of evaporator 3, third discharge port and movable flow device 6
Feed inlet connection, the discharge port of the movable flow device 6 are connect with the feed inlet of centrifuge 7, and the outlet of the evaporator 3 connects heating
The outlet of device 4, the heater 4 connects gas-liquid separator 5.
One 1 feed inlet of thawing bucket is connected with saltcake centrifuge 10.
The thawing bucket 1 and thawing bucket 22 are provided with PH and adjust inlet 11.
The thawing bucket 22 is connected with cooling device 9 by exhaust pipe.
The cooling device 9 is connected with blower 8.
Pump 1 is provided on the pipeline melted between bucket 1 and thawing bucket 22.
It is provided with pump 3 18 in the connecting pipe of the feed inlet of second discharge port for melting bucket 22 and evaporator 3, the
Pump 4 19 is provided in the connecting pipe of the feed inlet of three discharge ports and movable flow device 6.
Pump 2 17 is provided in the connecting pipe of the evaporator 3 and heater 4.
Secondary steam outlet 13 is provided on the evaporator 3 and gas-liquid separator 5.
Embodiment 2
A kind of saltcake hot melting recycling utilizes system, including evaporator 3, heater 4, movable flow device 6 and centrifuge 7, further includes
Melt bucket 1, melt bucket 22 and gas-liquid separator 5, the discharge port for melting bucket 1 and the first charging aperture for melting bucket 22
Connection, the feed inlet for melting bucket 1 are connect with the first discharge port for melting two barrels, second charging for melting bucket 22
Mouth is connect with the discharge port of evaporator 3, and third feed inlet is connect with the outlet of movable flow device 6, and the 4th feed inlet goes out with centrifuge 7
Material mouth connection, second discharge port for melting bucket 22 are connect with the feed inlet of evaporator 3, third discharge port and movable flow device 6
Feed inlet connection, the discharge port of the movable flow device 6 are connect with the feed inlet of centrifuge 7, and the outlet of the evaporator 3 connects heating
The outlet of device 4, the heater 4 connects gas-liquid separator 5.
One 1 feed inlet of thawing bucket is connected with saltcake centrifuge 10.
The thawing bucket 1 and thawing bucket 22 are provided with PH and adjust inlet 11.
The thawing bucket 22 is connected with cooling device 9 by exhaust pipe.
The cooling device 9 is connected with blower 8.
Pump 1 is provided on the pipeline melted between bucket 1 and thawing bucket 22.
It is provided with pump 3 18 in the connecting pipe of the feed inlet of second discharge port for melting bucket 22 and evaporator 3, the
Pump 4 19 is provided in the connecting pipe of the feed inlet of three discharge ports and movable flow device 6.
Pump 2 17 is provided in the connecting pipe of the evaporator 3 and heater 4.
Secondary steam outlet 13 is provided on the evaporator 3 and gas-liquid separator 5.
The evaporator 3 is connected with fluid level control device.
One 1 top of thawing bucket is provided with material inlet, is provided on the thawing bucket 1 and adjusts PH adjusting charging
Mouth, bottom discharge port, level gauging device installing port, top rinse mouth, top vent, top manhole and bottom slag discharge,
Agitating device.
22 top of thawing bucket is provided with material inlet, is provided on the thawing bucket 22 and adjusts PH adjusting charging
Mouth, bottom discharge port, level gauging device installing port, top rinse mouth, top vent, top manhole and bottom slag discharge,
Agitating device.
The evaporator 3 is connected with two heating devices, and 3 bottom of evaporator is provided with inlet, described
Inlet is connected with the discharge port for melting bucket 22, and the top of the evaporator 3 is provided with discharge port, the discharge port
It is connected with the material inlet for melting bucket 22, the top of the evaporator 3 is provided with secondary steam discharge outlet.
The top of the movable flow device 6 is provided with feed inlet mouth, and the stock inlet is connected by pipeline and the thawing bucket 22
It connects, the bottom of the thickener is provided with liquid outlet.
It is provided with centrifuge 7 below the movable flow device 6, the centrifuge 7 is by the separation of solid and liquid of anhydrous sodium sulphate slurry.
The spraying ventilating device 9 is connected on the thawing bucket 22, and connects blower 8, it will be in the thawing bucket 22
High-temperature gas discharges after cooling down.
Saltcake hot melting recycling described in the present embodiment utilizes system work process are as follows:
The water of certain liquid level will be injected in the thawing bucket 22, and starts the pump, heat is driven into the evaporator 3,
To reach certain liquid level in the evaporator 3, when there is overflow from the fluid level control device, starts the pump 2 17, carry out
The Matter Transfer of the heater 4 and the evaporator 3；
When temperature reaches a certain level in the thawing bucket 22, starts the discharge port one for melting bucket 22 and melt
Pump 1 on the pipeline of the feed inlet connection of bucket 1, by delivery to the saltcake for melting the saltcake centrifuge 10 and deviating from,
And enter the thawing bucket 1, when reaching certain liquid level in the thawing bucket 1, start the feed inlet for melting bucket 22
Pump 1 on one pipeline connecting with the discharge port for melting bucket 1, is transmitted back to the thawing bucket 22 for material, to the system
Melt bucket 1 in system, melt that bucket 22, liquid level maintains to stablize in evaporator 3, saltcake is continually from the saltcake centrifuge 10
Into system, saltcake in system is set to reach saturation under hot melt state, and crystallization is precipitated；Anhydrous sodium sulphate knot to be precipitated in system
When crystalline substance reaches certain solid-to-liquid ratio, start it is described pump 4 19, material is delivered to the movable flow device 6, by the movable flow device 6 into
Row enrichment, the slurry after enrichment enter the saltcake centrifuge 10, and the mother liquor isolated directly returns the thawing bucket 22, point
The anhydrous sodium sulphate separated out is exported by anhydrous sodium sulphate discharge port 15.
The thawing bucket 1 and thawing bucket 22 is provided with PH and adjusts liquid import, adjusts PH in production, reduces material
The corrosion to system equipment is flowed, the PH of institute's output anhydrous sodium sulphate is adjusted, increases the economy of system.
It is provided with secondary steam pipe at the top of the evaporator 3, the low-pressure secondary steam that system evaporation generates is recycled
It utilizes, 3 top of evaporator is provided with steam security valve, and system when preventing fortuitous event builds the pressure, and increases system
Economy and safety.
4 end of heater is provided with the vapour liquid separator, and the vapor-liquid separating device secondary steam outlet 13 connects
4 secondary steam import of pre-heater is flashed, according to the efficient operation principle of vapor-liquid separating device, under the action of vacuum, is realized
The reuse of condensation water residual heat；Raw energy utilization rate is improved, the economy of system process is further increased.
It is provided with Liquid level overflow mechanism in the middle part of the evaporator 3, passes through Liquid level overflow mechanism realization pair
The Liquid level of the evaporator 3, ensures the evaporation efficiency of the system；The Liquid level overflow mechanism is connected to described melt
Change 22 bottom of bucket, realizes the fluid-tight effect of the evaporator 3.
6 bottom discharge port of movable flow device is connected to the thawing bucket 22, and 6 upper feed inlet of movable flow device is connected to
The thawing bucket；When may be implemented in the anhydrous sodium sulphate dehydration device failure, without the operation of halt system, it is only necessary to starch enrichment
Material is directly switch into the thawing bucket 22.
The cooling device 9 connects the thawing bucket 22, and connect with the blower 8, will dissipate in the thawing bucket 22
The high-temperature steam of sending detaches, and is discharged during detaching using spraying cooling, reduces the influence to environment, improves the ring of system
Guarantor property.
The above is only intended to clearly illustrate example, and does not limit the embodiments.For affiliated
For the those of ordinary skill in field, other different forms of changes or modifications may be made based on the above description,
There is no necessity and possibility to exhaust all the enbodiments, and obvious changes or variations extended from this are still
Among the protection scope of the utility model.
Claims (9)
1. a kind of saltcake hot melting recycling utilizes system, including evaporator (3), heater (4), movable flow device (6) and centrifuge (7),
It is characterized by also including melt bucket one (1), thawing bucket two (2) and gas-liquid separator (5), the discharging for melting bucket one (1)
Mouth is connect with the first charging aperture for melting bucket two (2), the first discharge port of two barrels of the feed inlet for melting bucket one (1) and thawing
Connection, the second charging aperture for melting bucket two (2) are connect with the discharge port of evaporator (3), third feed inlet and movable flow device (6)
Outlet connection, the 4th feed inlet connect with the discharge port of centrifuge (7), second discharge port for melting bucket two (2) and steaming
Send out the feed inlet connection of device (3), third discharge port connect with the feed inlet of movable flow device (6), the discharge port of the movable flow device (6) and
The feed inlet of centrifuge (7) connects, and the outlet of the evaporator (3) connects heater (4), and the outlet of the heater (4) connects
Connect gas-liquid separator (5).
2. a kind of saltcake hot melting recycling as described in claim 1 utilizes system, it is characterised in that: the thawing bucket one (1) into
Material mouth is connected with saltcake centrifuge (10).
3. a kind of saltcake hot melting recycling as described in claim 1 utilizes system, it is characterised in that: the thawing bucket one (1) and
Melt bucket two (2) and is provided with PH adjusting inlet (11).
4. a kind of saltcake hot melting recycling as described in claim 1 utilizes system, it is characterised in that: the thawing bucket two (2) is logical
It crosses exhaust pipe and is connected with cooling device (9).
5. a kind of saltcake hot melting recycling as claimed in claim 4 utilizes system, it is characterised in that: the cooling device (9) is even
It is connected to blower (8).
6. a kind of saltcake hot melting recycling as described in claim 1 utilizes system, it is characterised in that: the thawing bucket one (1) and
Melt and is provided with pump one (16) on the pipeline between bucket two (2).
7. a kind of saltcake hot melting recycling as described in claim 1 utilizes system, it is characterised in that: thawing bucket two (2)
It is provided with pump three (18) in the connecting pipe of the feed inlet of second discharge port and evaporator (3), third discharge port and movable flow device (6)
Feed inlet connecting pipe on be provided with pump four (19).
8. a kind of saltcake hot melting recycling as described in claim 1 utilizes system, it is characterised in that: the evaporator (3) and plus
Pump two (17) is provided in the connecting pipe of hot device (4).
9. a kind of saltcake hot melting recycling as described in claim 1 utilizes system, it is characterised in that: the evaporator (3) is gentle
Secondary steam outlet (13) is provided on liquid/gas separator (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338426.8U CN209128047U (en) | 2018-08-20 | 2018-08-20 | Glauber's salt hot melt recycle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338426.8U CN209128047U (en) | 2018-08-20 | 2018-08-20 | Glauber's salt hot melt recycle system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209128047U true CN209128047U (en) | 2019-07-19 |
Family
ID=67229139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821338426.8U Active CN209128047U (en) | 2018-08-20 | 2018-08-20 | Glauber's salt hot melt recycle system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209128047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541203A (en) * | 2019-08-23 | 2019-12-06 | 神马实业股份有限公司 | Heating system of polymer melt spinning processing equipment |
-
2018
- 2018-08-20 CN CN201821338426.8U patent/CN209128047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541203A (en) * | 2019-08-23 | 2019-12-06 | 神马实业股份有限公司 | Heating system of polymer melt spinning processing equipment |
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