CN219209476U - Energy-saving device of spinning hot air system in spandex production - Google Patents
Energy-saving device of spinning hot air system in spandex production Download PDFInfo
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- CN219209476U CN219209476U CN202223086789.6U CN202223086789U CN219209476U CN 219209476 U CN219209476 U CN 219209476U CN 202223086789 U CN202223086789 U CN 202223086789U CN 219209476 U CN219209476 U CN 219209476U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The utility model relates to the technical field of spandex spinning production equipment, in particular to an energy-saving device of a spinning hot air system in spandex production, which comprises a spinning channel for spandex production, a triethylene glycol spray tower taking triethylene glycol as spray liquid, and a hot air circulation loop connected between the spinning channel and the triethylene glycol spray tower, wherein the hot air circulation loop comprises a hot air exhaust pipeline connected between the spinning channel and the bottom part of the triethylene glycol spray tower and used for pumping hot air in the spinning channel into the triethylene glycol spray tower, and a hot air supply pipeline connected between the spinning channel and the top part of the triethylene glycol spray tower and used for conveying sprayed hot air into the spinning channel. The utility model reduces the energy consumption of spandex spinning production and reduces the spandex spinning production cost.
Description
Technical Field
The utility model relates to the technical field of spandex spinning production equipment, in particular to an energy-saving device of a spinning hot air system in spandex production.
Background
In the spandex spinning production process, the mass content of the polymer in the spinning stock solution entering the spinning assembly is about 35%, and the rest 65% is DMAC solvent. After the spinning dope enters a spinning upper channel through a spinneret plate, the DMAC solvent in the dope needs to be quickly evaporated. The rest polymer is solidified and formed, and the polyurethane fiber is finally prepared through the working procedures of middle channel, lower channel, false twisting, oiling, winding and the like. The hot air containing DMAC solvent from the spinning channel passes through a solvent recovery system to recover most of the DMAC solvent. The gas treated by the solvent recovery system is sent into a spinning channel for recycling after being heated.
DMAC solvent recovery of the existing spandex spinning hot air system is achieved by cooling the return air of a spinning channel, so that DMAC gas contained in hot air is condensed, and the DMAC gas is collected and sent to a solvent rectifying system. And heating the return air condensed by the DMAC by a heat exchanger to the process set temperature, and then sending the return air into a spinning channel for recycling. The return air of the spinning channel is cooled and then heated, so that the energy consumption of the public engineering required in the process is high, and the production cost is greatly increased.
Disclosure of Invention
In order to solve the problems, the utility model provides an energy-saving device of a spinning hot air system in spandex production, which aims to reduce energy consumption in spandex spinning production and reduce spandex spinning production cost. The specific technical scheme is as follows:
the energy-saving device of the spinning hot air system in the spandex production comprises a spinning channel for the spandex production, a triethylene glycol spray tower taking triethylene glycol as spray liquid, and a hot air circulation loop connected between the spinning channel and the triethylene glycol spray tower, wherein the hot air circulation loop comprises a hot air exhaust pipeline connected between the spinning channel and the bottom part of the triethylene glycol spray tower and used for pumping hot air in the spinning channel into the triethylene glycol spray tower, and a hot air supply pipeline connected between the spinning channel and the top of the triethylene glycol spray tower and used for conveying sprayed hot air into the spinning channel.
In the utility model, a circulating fan is arranged on the hot air circulating loop.
Preferably, the circulating fan is arranged on a hot air exhaust pipeline of the hot air circulating loop.
In the utility model, the tower bottom of the triethylene glycol spray tower is connected with a first delivery pump, and the output port of the first delivery pump is connected to a spray header in the triethylene glycol spray tower through a spray pipeline.
Preferably, the energy-saving device of the spinning hot air system in spandex production further comprises a tower bottom solution collecting tank for collecting the tower bottom solution in the triethylene glycol spray tower, and the output port of the first conveying pump is further connected to the tower bottom solution collecting tank through a first tower bottom solution conveying pipeline.
More preferably, the energy-saving device of the spinning hot air system in spandex production further comprises a DMAC rectifying tower for separating the bottom solution collected by the bottom solution collecting tank, wherein the bottom solution collecting tank is connected with a second conveying pump, and an output port of the second conveying pump is connected to the DMAC rectifying tower through a second bottom solution conveying pipeline.
As a further improvement, the energy-saving device of the spinning hot air system in spandex production is provided with a heat exchanger between the first tower bottom liquid conveying pipeline and the second tower bottom liquid conveying pipeline.
In the utility model, the bottom of the DMAC rectifying tower is connected with a reboiler for carrying out supplementary heating on the bottom solution of the DMAC rectifying tower, the bottom solution of the DMAC rectifying tower is connected with the reboiler through a reboiling circulation loop, and the reboiler is also connected with an external steam heating pipeline for carrying out heat exchange with the bottom solution of the DMAC rectifying tower.
In the utility model, the bottom of the DMAC rectifying tower is also connected with a third delivery pump, and the output port of the third delivery pump is connected with a spray pipeline on the triethylene glycol spray tower through a third bottom liquid delivery pipeline.
In the utility model, the reboiling circulation loop is provided with a fourth conveying pump.
In the utility model, a DMAC crude product output pipeline is arranged at the top of the DMAC rectifying tower.
In the utility model, a tank body of the tower bottom solution collecting tank is provided with a heat insulation material.
The process principle of the utility model is as follows:
the channel hot air with the DMAC at the temperature of about 210 ℃ is sent to a triethylene glycol spray tower by a circulating fan, and triethylene glycol spray liquid used by the spray tower has the boiling point of 289 ℃ under normal pressure and good DMAC dissolution performance. The triethylene glycol used for spraying comes from the bottom of the DMAC rectifying tower, the temperature is kept at about 210 ℃, DMAC in the channel hot air is absorbed by the triethylene glycol under the condition of not reducing the temperature (the DMAC content in the hot air after detection is less than 0.5 percent), and then the hot air with the maintained temperature is sent into the spinning channel for recycling.
The triethylene glycol used by the spray tower is recycled, and the balance of inlet and outlet is adjusted according to the consumption condition of a production system; when the concentration of DMAC in spray liquid at the bottom of the spray tower reaches a certain value, the DMAC is sent to a tower bottom solution collecting tank through a first delivery pump and a first tower bottom solution delivery pipeline, and then is sent to a DMAC rectifying tower through a second delivery pump and a second tower bottom solution delivery pipeline to separate out a DMAC crude product; the triethylene glycol solution from which the DMAC is separated is returned to the triethylene glycol spray tower for recycling through a third conveying pump and a third tower bottom solution conveying pipeline at the bottom of the DMAC rectifying tower.
A heat exchanger is arranged between the first tower bottom solution conveying pipeline and the second tower bottom solution conveying pipeline, and the solution conveyed to the DMAC rectifying tower on the second tower bottom solution conveying pipeline is heated by utilizing the high-temperature heat of the first tower bottom solution conveying pipeline, so that the temperature of the solution entering the DMAC rectifying tower is increased, and the heat is fully utilized.
A reboiler is also arranged on the DMAC rectifying tower to supplement the heat required by the DMAC rectifying tower.
The beneficial effects of the utility model are as follows:
firstly, the energy-saving device of the hot air spinning system in spandex production adopts the triethylene glycol spray tower to absorb DMAC in the hot air of the spinning channel, and the hot air of the channel does not need to be cooled and then heated, so that the energy consumption in spandex spinning production is greatly reduced, and the spandex spinning production cost is reduced.
Secondly, the energy-saving device of the spinning hot air system in spandex production has the advantages that triethylene glycol used by the spray tower is recycled, and the economical efficiency and the environmental protection are good.
Thirdly, the energy-saving device of the spinning hot air system in spandex production provided by the utility model has the advantages that the high-temperature heat of the bottom spray liquid of the triethylene glycol spray tower can be reused for improving the temperature of the solution entering the DMAC rectifying tower, so that the energy-saving effect of the spinning hot air system in spandex production is further improved.
Fourth, the energy-saving device of the spinning hot air system in spandex production does not need to use chilled water or other refrigerants for cooling, so that the using load of public works is reduced.
Drawings
Fig. 1 is a schematic structural view of an energy-saving device of a spinning hot air system in spandex production.
In the figure: 1. spinning channel 2, triethylene glycol spray tower, 3, circulating fan, 4, first delivery pump, 5, bottom solution collecting tank, 6, DMAC rectifying column, 7, second delivery pump, 8, heat exchanger, 9, reboiler, 10, third delivery pump, 11, fourth delivery pump, 12, shower head.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
An embodiment of an energy-saving device of a spinning hot air system in spandex production is shown in fig. 1, and comprises a spinning channel 1 for spandex production, a triethylene glycol spray tower 2 adopting triethylene glycol as spray liquid, and a hot air circulation loop connected between the spinning channel 1 and the triethylene glycol spray tower 2, wherein the hot air circulation loop comprises a hot air suction pipeline connected between the spinning channel 1 and the bottom part of the triethylene glycol spray tower 2 and used for pumping hot air in the spinning channel 1 into the triethylene glycol spray tower 2, and a hot air supply pipeline connected between the spinning channel 1 and the top part of the triethylene glycol spray tower 2 and used for pumping sprayed hot air into the spinning channel 1.
In this embodiment, the hot air circulation loop is provided with a circulation fan 3.
Preferably, the circulating fan 3 is arranged on a hot air suction pipeline of the hot air circulating loop.
In this embodiment, a first delivery pump 4 is connected to the bottom of the triethylene glycol spray tower 2, and an output port of the first delivery pump 4 is connected to a spray header in the triethylene glycol spray tower 2 through a spray pipeline.
Preferably, the energy-saving device of the spinning hot air system in spandex production of the embodiment further comprises a bottom solution collecting tank 5 for collecting the bottom solution in the triethylene glycol spray tower 2, and the output port of the first conveying pump 4 is further connected to the bottom solution collecting tank 5 through a first bottom solution conveying pipeline.
More preferably, the energy-saving device of the spinning hot air system in spandex production according to this embodiment further includes a DMAC rectifying tower for separating the bottom solution collected by the bottom solution collecting tank 5, the bottom solution collecting tank 5 is connected with a second transfer pump 7, and an output port of the second transfer pump 7 is connected to the DMAC rectifying tower 6 through a second bottom solution transfer pipeline.
As a further improvement, an energy-saving device of a spinning hot air system in spandex production of the embodiment is provided with a heat exchanger 8 between the first bottom liquid conveying pipeline and the second bottom liquid conveying pipeline.
In this embodiment, a reboiler 9 for performing additional heating on the bottom solution of the DMAC rectifying tower 6 is connected to the bottom of the DMAC rectifying tower 6, the bottom solution of the DMAC rectifying tower 6 is connected to the reboiler 9 through a reboiling circulation loop, and an external steam heating pipeline for performing heat exchange with the bottom solution of the DMAC rectifying tower 6 is further connected to the reboiler 9.
In this embodiment, a third transfer pump 10 is further connected to the bottom of the DMAC rectifying tower 6, and an output port of the third transfer pump 10 is connected to a spray pipeline on the triethylene glycol spray tower 2 through a third bottom liquid transfer pipeline.
In this embodiment, the reboiling circulation loop is provided with a fourth transfer pump 11.
In this embodiment, a DMAC crude product output pipeline is arranged at the top of the DMAC rectifying tower 6.
In this embodiment, a tank body of the bottom solution collecting tank 5 is provided with a heat insulation material.
The process principle of this embodiment is as follows:
the channel hot air with the DMAC at the temperature of about 210 ℃ is sent to a triethylene glycol spray 2 tower by a circulating fan 3, and triethylene glycol spray liquid used by the spray tower 3 has the boiling point of 289 ℃ under normal pressure and good DMAC dissolution performance. The triethylene glycol used for spraying comes from the bottom of the DMAC rectifying tower 6, the temperature is kept at about 210 ℃, DMAC in the channel hot air is absorbed by the triethylene glycol under the condition of not reducing the temperature (the DMAC content in the hot air after detection is less than 0.5 percent), and then the hot air with the maintained temperature is sent into the spinning channel 1 for recycling.
The triethylene glycol used by the spray tower 2 is recycled, and the balance of inlet and outlet is adjusted according to the consumption condition of a production system; when the concentration of DMAC in spray liquid at the bottom of the spray tower 2 reaches a certain value, the DMAC is sent to a tower bottom solution collection tank 5 through a first delivery pump 4 and a first tower bottom solution delivery pipeline, and then is sent to a DMAC rectifying tower 6 through a second delivery pump 7 and a second tower bottom solution delivery pipeline to separate out a DMAC crude product; the triethylene glycol solution from which the DMAC is separated is returned to the triethylene glycol spray tower 2 for recycling through a third delivery pump 10 and a third bottom solution delivery pipeline at the bottom of the DMAC rectifying tower 6.
A heat exchanger 8 is arranged between the first bottom solution conveying pipeline and the second bottom solution conveying pipeline, and the solution conveyed to the DMAC rectifying tower 6 on the second bottom solution conveying pipeline is heated by utilizing the high-temperature heat of the first bottom solution conveying pipeline, so that the temperature of the solution entering the DMAC rectifying tower 6 is increased, and the heat is fully utilized.
A reboiler 9 is also provided on the DMAC rectifying column 6 to supplement the heat required for the DMAC rectifying column 6.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (10)
1. The energy-saving device of the spinning hot air system in the spandex production is characterized by comprising a spinning channel for spandex production, a triethylene glycol spray tower taking triethylene glycol as spray liquid, and a hot air circulation loop connected between the spinning channel and the triethylene glycol spray tower, wherein the hot air circulation loop comprises a hot air exhaust pipeline connected between the spinning channel and the bottom part of the triethylene glycol spray tower and used for pumping hot air in the spinning channel into the triethylene glycol spray tower, and a hot air supply pipeline connected between the spinning channel and the top of the triethylene glycol spray tower and used for pumping sprayed hot air into the spinning channel.
2. The energy-saving device of a spinning hot air system in spandex production according to claim 1, wherein a circulating fan is arranged on the hot air circulation loop.
3. The energy saving device for a hot air spinning system in spandex production according to claim 2, wherein the circulating fan is arranged on a hot air suction pipe of the hot air circulating loop.
4. The energy-saving device of a spinning hot air system in spandex production according to claim 1, wherein a first conveying pump is connected to the bottom of the triethylene glycol spray tower, and an output port of the first conveying pump is connected to a spray header in the triethylene glycol spray tower through a spray pipeline.
5. The energy saving device for a hot air spinning system in spandex production according to claim 4, further comprising a bottom solution collecting tank for collecting a bottom solution in said triethylene glycol spray tower, wherein the output port of said first transfer pump is further connected to said bottom solution collecting tank through a first bottom solution transfer line.
6. The energy-saving device of a hot air spinning system in spandex production according to claim 5, further comprising a DMAC rectifying tower for separating the bottom solution collected by the bottom solution collecting tank, wherein the bottom solution collecting tank is connected with a second transfer pump, and an output port of the second transfer pump is connected to the DMAC rectifying tower through a second bottom solution transfer pipeline.
7. The energy saving device for a hot air spinning system in spandex production according to claim 6, wherein a heat exchanger is provided between the first bottom liquid transfer line and the second bottom liquid transfer line.
8. The energy-saving device of a hot air spinning system in spandex production according to claim 6, wherein the bottom of the DMAC rectifying tower is connected with a reboiler for carrying out supplementary heating on the bottom solution of the DMAC rectifying tower, the bottom solution of the DMAC rectifying tower is connected with the reboiler through a reboiling circulation loop, and an external steam heating pipeline for carrying out heat exchange with the bottom solution of the DMAC rectifying tower is also connected on the reboiler.
9. The energy-saving device of a spinning hot air system in spandex production according to claim 8, wherein the bottom of the DMAC rectifying tower is also connected with a third conveying pump, and an output port of the third conveying pump is connected with a spraying pipeline on the triethylene glycol spraying tower through a third bottom liquid conveying pipeline.
10. The energy saving device for a hot air spinning system in spandex production according to claim 8, wherein a fourth transfer pump is provided on the reboiling circulation loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223086789.6U CN219209476U (en) | 2022-11-17 | 2022-11-17 | Energy-saving device of spinning hot air system in spandex production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223086789.6U CN219209476U (en) | 2022-11-17 | 2022-11-17 | Energy-saving device of spinning hot air system in spandex production |
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| CN219209476U true CN219209476U (en) | 2023-06-20 |
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| CN202223086789.6U Active CN219209476U (en) | 2022-11-17 | 2022-11-17 | Energy-saving device of spinning hot air system in spandex production |
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| CN (1) | CN219209476U (en) |
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- 2022-11-17 CN CN202223086789.6U patent/CN219209476U/en active Active
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