CN212452090U - Paper machine dryer condensate water discharge system - Google Patents
Paper machine dryer condensate water discharge system Download PDFInfo
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- CN212452090U CN212452090U CN202021062352.7U CN202021062352U CN212452090U CN 212452090 U CN212452090 U CN 212452090U CN 202021062352 U CN202021062352 U CN 202021062352U CN 212452090 U CN212452090 U CN 212452090U
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Abstract
The utility model discloses a condensate water discharge system of a drying cylinder of a paper machine, which comprises a drying cylinder, a first steam trap and a heat exchange device, wherein the steam inlet end of the drying cylinder is used for introducing steam to heat paper sheets; the inlet of the first steam trap is connected with the drainage end of the drying cylinder; a heat medium inlet of the heat exchange device is connected with an outlet of the first steam drain valve, a heat medium outlet of the heat exchange device is used for being connected with the condensed water collecting device, a refrigerant inlet end of the heat exchange device is used for introducing air, and a refrigerant outlet of the heat exchange device is used for being connected with a paper machine to provide hot air for the paper machine; this application can make the comdenstion water in the dryer can discharge as early as possible and the steam of high temperature can not be along with the comdenstion water discharge for steam can fully carry out the heat exchange in the dryer, just can discharge through first steam trap until it has become the comdenstion water, can improve the heat utilization of dryer to steam.
Description
Technical Field
The utility model belongs to the technical field of the comdenstion water is discharged, especially, relate to a papermaking machine dryer comdenstion water discharge system.
Background
The condensed water discharge system of the drying cylinder of the paper machine is that after fresh steam is introduced into the drying cylinder to heat paper sheets, the steam is subjected to heat radiation and energy exchange through the drying cylinder, in order to improve the utilization rate of the steam, the steam is required to be discharged from the drying cylinder after being subjected to heat conversion, but the condensed water is discharged and accompanied with the steam, the traditional method is used for improving the utilization rate of the steam, generally, a mixture of the discharged condensed water and the steam is subjected to steam separation through a flash tank, the separated steam is heated through a heat pump and then is returned to the drying cylinder again, the steam is secondarily used to improve the utilization rate of heat of the steam, but because the steam separated from the flash tank is accompanied with a large amount of steam, the steam belongs to wet steam, the density of the wet steam is too high, the wet steam is mixed with the fresh steam with high calorific value and enters the drying, the drainage difficulty of the drying cylinder can be increased, so that the temperature in the drying cylinder is reduced, and the heat utilization rate of steam is reduced in a phase-changing manner, so that the condensed water drainage system of the papermaking drying cylinder is provided, the heat utilization rate of fresh steam can be improved, and the phenomenon that condensed water in the drying cylinder is difficult to drain due to the addition of wet steam is avoided.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a paper machine dryer condensate water discharge system aims at solving the problem that the heat utilization rate that exists is low among the traditional technical scheme.
An embodiment of the utility model provides a paper machine dryer comdenstion water discharge system, include
The steam inlet end of the drying cylinder is used for introducing steam to heat the paper sheet;
the inlet of the first steam drain valve is connected with the drainage end of the drying cylinder; and
the heat exchange device is characterized in that a heat medium inlet of the heat exchange device is connected with an outlet of the first steam drain valve, a heat medium outlet of the heat exchange device is used for being connected with the condensed water collecting device, a refrigerant inlet end of the heat exchange device is used for introducing air, and a refrigerant outlet of the heat exchange device is used for being connected with a paper machine to provide hot air for the paper machine.
In one embodiment, the heat exchange device comprises a first heat exchanger and a second heat exchanger; the heat exchange device comprises a first heat exchanger, a second heat exchanger, a heat medium inlet, a heat medium outlet, a refrigerant inlet, a refrigerant outlet, a heat medium inlet, a heat medium outlet and a heat medium outlet, wherein the heat medium outlet of the first heat exchanger is connected with the heat medium inlet of the second heat exchanger, the refrigerant inlet of the first heat exchanger is connected with the refrigerant outlet of the second heat exchanger, the heat medium inlet of the first heat exchanger is the heat medium inlet of the heat exchange device, the refrigerant outlet of the first heat exchanger is the refrigerant outlet of the heat exchanger, the refrigerant inlet of the second heat exchanger is the refrigerant inlet of the heat exchange device, and the.
In one embodiment, the heat exchange device further comprises a second steam trap, and the heat medium outlet of the first heat exchanger is connected with the heat medium inlet of the second heat exchanger through the second steam trap.
In one embodiment, the heat exchange device further comprises a third steam trap, and the heating medium outlet of the second heat exchanger is connected with the condensed water collection device through the third steam trap.
In one embodiment, the drying cylinder further comprises a pressure regulating valve, wherein the steam inlet end of the drying cylinder is connected with the pressure regulating valve, and the steam enters the drying cylinder through the pressure regulating valve.
In one embodiment, the device further comprises a differential pressure detection device and a regulating device; the pressure difference detection device is respectively connected with the steam inlet end and the water outlet end of the drying cylinder and is used for acquiring the pressure difference between the steam inlet end and the water outlet end; the regulating device is respectively connected with the pressure difference detection device and the pressure regulating valve, and the regulating device is configured to control the flow of the pressure regulating valve according to the pressure difference.
The first steam trap of the condensate water discharge system of the drying cylinder of the paper machine has the functions of discharging condensate water as soon as possible and automatically preventing leakage of steam, so that the condensate water in the drying cylinder can be discharged as soon as possible, high-temperature steam cannot be discharged along with the condensate water, the steam can be subjected to heat exchange in the drying cylinder fully, the steam cannot be discharged through the first steam trap until the steam becomes the condensate water, and the heat utilization rate of the drying cylinder to the steam can be improved; the heat medium export of heat exchange device is used for being connected with comdenstion water collection device, heat exchange device's refrigerant entrance point is used for letting in air, heat exchange device's refrigerant export is used for being connected for providing the hot-blast for the paper machine with the paper machine, and heat exchange device can carry out the heat that carries the comdenstion water and then just discharge the comdenstion water of heat exchange once more to comdenstion water collection device and retrieve, and the heat that the comdenstion water carried carries out the heat exchange through the air with letting in heat exchanger for air temperature rises, and then discharges the hot-air and be used for providing the paper machine, can improve the utilization ratio of the energy, has further improved the heat utilization.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is an exemplary functional block diagram of a paper machine dryer condensate drain system of the present application;
fig. 2 is an exemplary structural schematic diagram of the paper machine cylinder condensate drainage system of the present application.
The drawings illustrate schematically: 1-drying cylinder; 2-a first steam trap; 3-heat exchange means; 31-a first heat exchanger; 32-a second heat exchanger; 33-a second steam trap; 34-a third steam trap; 4-a condensate water collection device; 51-a pressure regulating valve; 52-differential pressure detection means; 52-adjustment means.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a condensate draining system for a drying cylinder 1 of a paper machine comprises a drying cylinder 1, a first steam trap 2 and a heat exchange device 3. The steam inlet end of the drying cylinder 1 is used for introducing steam to heat paper sheets, the steam is introduced from other devices, the drying cylinder 1 heats the paper sheets by utilizing the steam, the conventional use of the drying cylinder 1 in the paper making industry is realized, and the detailed explanation of the specific structure and the action principle of the drying cylinder 1 is not needed. The drainage end of the drying cylinder 1 is connected with the inlet of the first steam trap 2, the outlet of the first steam trap 2 is connected with the heat medium inlet of the heat exchange device 3, and the first steam trap 2 has the functions of draining condensed water as soon as possible and automatically preventing leakage of steam at the same time, so that the condensed water in the drying cylinder 1 can be drained as soon as possible, high-temperature steam cannot be drained along with the condensed water, the steam can fully exchange heat in the drying cylinder 1, the steam cannot be drained through the first steam trap 2 until the steam becomes the condensed water, and the heat utilization rate of the drying cylinder 1 to the steam can be improved; the heat medium outlet of the heat exchange device 3 is used for being connected with the condensed water collecting device 4, the refrigerant inlet end of the heat exchange device 3 is used for introducing air, the refrigerant outlet of the heat exchange device 3 is used for being connected with a paper machine to provide hot air for the paper machine, the heat exchange device 3 can utilize the heat carried by the condensed water again and then discharge the condensed water subjected to heat exchange again to the condensed water collecting device 4 for recycling, the heat carried by the condensed water is subjected to heat exchange with the air introduced into the heat exchanger, so that the air temperature rises, the hot air is discharged to be provided for the paper machine, the utilization rate of energy can be improved, and the heat utilization rate of steam is further improved.
As shown in fig. 2, in one embodiment, the heat exchange device 3 comprises a first heat exchanger 31 and a second heat exchanger 32; a heat medium outlet of the first heat exchanger 31 is connected with a heat medium inlet of the second heat exchanger 32, a refrigerant inlet of the first heat exchanger 31 is connected with a refrigerant outlet of the second heat exchanger 32, a heat medium inlet of the first heat exchanger 31 is a heat medium inlet of the heat exchanger 3, a refrigerant outlet of the first heat exchanger 31 is a refrigerant outlet of the heat exchanger, a refrigerant inlet of the second heat exchanger 32 is a refrigerant inlet of the heat exchanger 3, and a heat medium outlet of the second heat exchanger 32 is a heat medium outlet of the heat exchanger 3; by providing the first heat exchanger 31 and the second heat exchanger 32, the time for heat exchange between the condensed water and the air can be made longer, and the heat exchange efficiency can be further improved.
In one embodiment, as shown in fig. 2, the heat exchange device 3 further comprises a second steam trap 33, the heat medium outlet of the first heat exchanger 31 is connected with the heat medium inlet of the second heat exchanger 32 through the second steam trap 33, because the condensed water passing through the first steam trap 2 is mixed with a small amount of water vapor, and the water vapor can be sufficiently heat exchanged with air in the first heat exchanger 31 through the second steam trap 33, so that the heat utilization rate is improved.
In one embodiment, as shown in fig. 2, the heat exchanging device 3 further includes a third steam trap 34, the heat medium outlet of the second heat exchanger 32 is connected to the condensed water collecting device 4 through the third steam trap 34, and the steam in the second heat exchanger 32 can be made to exchange heat with the air in the second heat exchanger 32 by the third steam trap 34, so as to improve the utilization rate of heat.
As shown in fig. 2, in one embodiment, a pressure regulating valve 51 is further included, the steam inlet end of the drying cylinder 1 is connected to the pressure regulating valve 51, the steam enters the drying cylinder 1 through the pressure regulating valve 51, and the flow rate of the steam entering the steam inlet end of the drying cylinder 1 can be adjusted by regulating the pressure regulating valve 51.
As shown in fig. 2, in one embodiment, the pressure difference detection device 52 and the adjustment device 52 are further included; the pressure difference detection device 52 is respectively connected with the steam inlet end and the water outlet end of the drying cylinder 1 and is used for acquiring the pressure intensities of the steam inlet end and the water outlet end and obtaining the pressure difference of the steam inlet end and the water outlet end according to the pressure intensities of the steam inlet end and the water outlet end; the differential pressure detection device 52 inputs differential pressure information to the adjustment device 52, and the adjustment device 52 adjusts the pressure adjustment valve 51 according to a preset regulation based on the differential pressure to adjust the flow rate of the pressure adjustment valve 51.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A condensate water discharge system of a drying cylinder of a paper machine is characterized by comprising
The steam inlet end of the drying cylinder is used for introducing steam to heat the paper sheet;
the inlet of the first steam drain valve is connected with the drainage end of the drying cylinder; and
the heat exchange device is characterized in that a heat medium inlet of the heat exchange device is connected with an outlet of the first steam drain valve, a heat medium outlet of the heat exchange device is used for being connected with the condensed water collecting device, a refrigerant inlet end of the heat exchange device is used for introducing air, and a refrigerant outlet of the heat exchange device is used for being connected with a paper machine to provide hot air for the paper machine.
2. A paper machine cylinder condensate drainage system as claimed in claim 1, characterized in that said heat exchange means comprise a first heat exchanger and a second heat exchanger; the heat exchange device comprises a first heat exchanger, a second heat exchanger, a heat medium inlet, a heat medium outlet, a refrigerant inlet, a refrigerant outlet, a heat medium inlet, a heat medium outlet and a heat medium outlet, wherein the heat medium outlet of the first heat exchanger is connected with the heat medium inlet of the second heat exchanger, the refrigerant inlet of the first heat exchanger is connected with the refrigerant outlet of the second heat exchanger, the heat medium inlet of the first heat exchanger is the heat medium inlet of the heat exchange device, the refrigerant outlet of the first heat exchanger is the refrigerant outlet of the heat exchanger, the refrigerant inlet of the second heat exchanger is the refrigerant inlet of the heat exchange device, and the.
3. A paper machine cylinder condensate drain system as claimed in claim 2, characterized in that said heat exchange means further comprises a second steam trap, through which the heating medium outlet of said first heat exchanger is connected to the heating medium inlet of the second heat exchanger.
4. A paper machine cylinder condensate drainage system as claimed in claim 2, characterized in that said heat exchanger means further comprises a third steam trap, through which the heating medium outlet of said second heat exchanger is connected to a condensate collection means.
5. A paper machine cylinder condensate drain system as claimed in claim 1, further comprising a pressure regulating valve, said cylinder being connected at its steam inlet end to said pressure regulating valve, said steam entering the cylinder through said pressure regulating valve.
6. The paper machine cylinder condensate drain system as claimed in claim 5, further comprising pressure difference detecting means and adjusting means; the pressure difference detection device is respectively connected with the steam inlet end and the water outlet end of the drying cylinder and is used for acquiring the pressure difference between the steam inlet end and the water outlet end; the regulating device is respectively connected with the pressure difference detection device and the pressure regulating valve, and the regulating device is configured to control the flow of the pressure regulating valve according to the pressure difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021062352.7U CN212452090U (en) | 2020-06-11 | 2020-06-11 | Paper machine dryer condensate water discharge system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021062352.7U CN212452090U (en) | 2020-06-11 | 2020-06-11 | Paper machine dryer condensate water discharge system |
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| Publication Number | Publication Date |
|---|---|
| CN212452090U true CN212452090U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021062352.7U Active CN212452090U (en) | 2020-06-11 | 2020-06-11 | Paper machine dryer condensate water discharge system |
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| CN (1) | CN212452090U (en) |
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2020
- 2020-06-11 CN CN202021062352.7U patent/CN212452090U/en active Active
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