CN210596817U - A paper machine drying system - Google Patents
A paper machine drying system Download PDFInfo
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- CN210596817U CN210596817U CN201921635801.XU CN201921635801U CN210596817U CN 210596817 U CN210596817 U CN 210596817U CN 201921635801 U CN201921635801 U CN 201921635801U CN 210596817 U CN210596817 U CN 210596817U
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- drying cylinder
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Abstract
The utility model belongs to the technical field of paper machine drying equipment's technique and specifically relates to a paper machine drying system is related to. The technical scheme of the utility model is realized like this: the utility model provides a paper machine drying system, includes heat pump, flash tank and a dryer with adjustable, heat pump links to each other with a dryer with adjustable, a dryer links to each other with a flash tank, be connected with catch water on the dryer, the adjustable heat pump is connected after the tail steam of a dryer exhaust passes through catch water, high-pressure steam is connected to the adjustable heat pump, the steam of a flash tank is used for the heating system of a dryer after the heat pump with adjustable pressurizes, its characterized in that: a first air pressure valve and a one-way valve of rated air pressure are arranged between the first flash tank and the adjustable heat pump, and the one-way valve controls the secondary steam to be transported to the adjustable heat pump in a one-way mode; and the first flash tank is connected with a secondary drying system. The utility model discloses the practicality is strong, easily promotes.
Description
Technical Field
The utility model belongs to the technical field of paper machine drying equipment's technique and specifically relates to a paper machine drying system is related to.
Background
The paper needs to be dried in the papermaking process, and the working principle of the drying part is as follows: the saturated steam introduced from the steam joint is condensed in the drying cylinder, and the temperature of the drying cylinder is raised by the released heat, so that the paper sheet which runs on the surface of the roller shell is heated. Heat is transferred to the paper in the contact between the paper and the surface of the drying cylinder, and the condensed water can absorb a part of heat in the steam in the process, and in order to reduce resource waste, part of enterprises at the present stage directly recover the condensed water and then converge the condensed water into high-pressure steam, as described in a patent specification published in CN108130785, but through use experiments, the condensed water is found; the method for recovering the heat of the condensed water has a problem that secondary steam of the condensed water is directly returned to a heating system, and the secondary steam has low temperature, so that the stability in the heating system is reduced, paper is not dried thoroughly, and the quality of paper production is influenced to a certain extent; secondly, the tissue dried by the dryer on the drying section is brittle after drying at high temperature, and the brittle paper is damaged.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a paper machine drying system.
The technical scheme of the utility model is realized like this: the utility model provides a paper machine drying system, includes heat pump, flash tank and a dryer with adjustable, heat pump links to each other with a dryer with adjustable, a dryer links to each other with a flash tank, be connected with catch water on the dryer, the adjustable heat pump is connected after the tail steam of a dryer exhaust passes through catch water, high-pressure steam is connected to the adjustable heat pump, the steam of a flash tank is used for the heating system of a dryer after the heat pump with adjustable pressurizes, its characterized in that: a first air pressure valve with rated air pressure of 400kpa and a one-way valve are arranged between the first flash tank and the adjustable heat pump, and the one-way valve controls the secondary steam to be transported to the adjustable heat pump in a one-way mode; the first flash tank is connected with a secondary drying system; the secondary drying system comprises a second flash tank, a second drying cylinder, a second adjustable heating pump, a condensate pump and a water tank, wherein the first flash tank is communicated with the second flash tank through a pressure valve; the second flash tank is communicated with a condensate pump; the second flash tank is also communicated with a second adjustable heating pump through a second pneumatic valve, and the rated air pressure of the second pneumatic valve is 200 kpa; the second adjustable heating pump is communicated with the second drying cylinder; the output port of the second drying cylinder is communicated with a condensate pump.
Preferably: the air humidifying system is arranged behind the second drying cylinder; the air humidifying system comprises an ultrasonic humidifier and a bottom roller, wherein the vacuum roller is arranged below the vacuum roller; the ultrasonic humidifier is arranged below the bottom roller; and a gap through which the paper can pass is arranged between the vacuum roll and the bottom roll.
Preferably: liquid level displays are installed on the first flash tank and the second flash tank.
Preferably: pressure regulating openings are formed in the first drying cylinder and the second drying cylinder, pressure valves are arranged on the pressure regulating openings, and rated pressure is set on the pressure valves.
Compared with the prior art, the utility model discloses the beneficial effect who brings does: firstly, a pressure valve is arranged between first flash tanks, rated pressure is arranged on the pressure valve, and the internal air pressure of the flash tanks is in direct proportion to the temperature of secondary steam, so that when the internal air pressure of the first flash tanks is greater than the rated pressure of the first air pressure valve, the pressure valve can be opened, namely the temperature is qualified at the moment, the secondary steam can be directly recycled into the first adjustable heater, and a one-way valve is arranged between the pressure valve and the first adjustable heater, so that the secondary steam can not flow back, and the safety and the drying efficiency are ensured to realize primary heat energy recycling; when the internal air pressure of the first flash tank is smaller than the rated pressure of the first air pressure valve; the secondary steam pressure in the cylinder is insufficient, so that along with the discharge of the secondary steam on the first drying cylinder, the liquid in the first flash tank can only be led to the second flash tank along the pressure valve, and the liquid level of the second flash tank rises at the moment; if the temperature of the gas in the second flash tank is qualified, the second air pressure valve is opened, and the air in the second flash tank enters the second drying cylinder along with the second air pressure valve to realize further recycling of heat energy; if the gas temperature in the second flash tank is unqualified, the air pressure cannot reach the rated air pressure of the second air pressure valve, the second air pressure valve cannot be opened, the accumulated liquid in the flash tank is increased, the liquid pressure is increased, and the accumulated liquid is discharged along with a condensate pump to realize a recyclable heat recovery drying system; the problem that the secondary steam of the condensed water directly returns to the heating system, the stability in the heating system is reduced due to the fact that the temperature of the secondary steam is not high enough, and paper is not dried completely is solved effectively, and the processing quality of products is improved.
1. An ultrasonic air humidifier is arranged behind the second drying cylinder and atomizes water into 1-5 micron ultrafine particles by adopting ultrasonic high-frequency oscillation at the frequency of 1.7MHZ, so that the fine water mist can not wet the paper towel and can soften the paper towel, and the phenomena that the paper towel becomes brittle after being dried at high temperature and the brittle paper is damaged are effectively solved; and residual heat on the paper can remain on both the vacuum roll and the bottom roll. The slight humidity of the paper generated by the humidifier can be evaporated and dried without affecting the quality of the paper;
2. liquid level displays are arranged on the first flash tank and the second flash tank, so that the liquid levels in the first flash tank and the second flash tank can be effectively displayed, the phenomenon of insufficient stock solution is prevented, and the normal operation of equipment is ensured;
3. pressure regulating openings are formed in the first drying cylinder and the second drying cylinder, and when the air pressure inside the drying cylinder is larger than the rated air pressure of a pressure valve in the pressure regulating opening, the steam inside the drying cylinder can be discharged through the pressure regulating openings, so that the internal air pressure balance is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in figure 1, the utility model discloses a paper machine drying system, which comprises an adjustable heat pump 1, a first flash tank 2 and a first drying cylinder 3, the adjustable heat pump 1 is connected with a first drying cylinder 3, the first drying cylinder 3 is connected with a first flash tank 2, the first drying cylinder 3 is connected with a steam-water separator 4, tail steam exhausted from the first drying cylinder 3 passes through the steam-water separator 4 and then is connected with an adjustable heat pump 1, the adjustable heat pump 1 is connected with high-pressure steam, the secondary steam of the first flash tank 2 is pressurized by the adjustable heat pump 1 and then is reused in a heating system of the first drying cylinder 3, in the specific embodiment of the utility model, a primary air pressure valve 5 with a rated air pressure of 400kpa and a check valve 6 are arranged between the primary flash tank 2 and the adjustable heat pump 1, and the check valve 6 controls the secondary steam to be transported to the adjustable heat pump 1 in a single direction; the first flash tank 2 is connected with a secondary drying system; the secondary drying system comprises a second flash tank 21, a second drying cylinder 22, a second adjustable heating pump 23 and a condensate water pump 24, and the first flash tank 2 is communicated with the second flash tank 21 through a pressure valve 25; the second flash tank 21 is communicated with a condensate pump 24; the second flash tank 21 is also communicated with a second adjustable heating pump 23 through a second pneumatic valve 26, and the rated air pressure of the second pneumatic valve 26 is 200 kpa; the second adjustable heating pump 23 is communicated with the second drying cylinder 22; the output port of the second drying cylinder 22 is communicated with a condensate water pump 24.
In the embodiment of the present invention, the drying device further comprises an air humidification system disposed after the second drying cylinder 22; the air humidifying system comprises an ultrasonic humidifier 31 and a bottom roller 33, wherein a vacuum roller 32 is arranged below the vacuum roller 32; the ultrasonic humidifier 31 is arranged below the bottom roller 33; a gap through which the sheet can pass is provided between the vacuum roll 32 and the bottom roll 33.
The utility model discloses in the concrete implementation mode, all install liquid level display on flash tank 2 and No. two flash tanks 21.
The utility model discloses in the concrete implementation mode, all set up the pressure regulating mouth on a dryer 3 and No. two dryers 33, be provided with pressure valve 34 on this pressure regulating mouth, be set for rated pressure on this pressure valve 34.
Compared with the prior art, the utility model discloses the beneficial effect who brings does: firstly, a pressure valve is arranged between first flash tanks, rated pressure is arranged on the pressure valve, and the internal air pressure of the flash tanks is in direct proportion to the temperature of secondary steam, so that when the internal air pressure of the first flash tanks is greater than the rated pressure of the first air pressure valve, the pressure valve can be opened, namely the temperature is qualified at the moment, the secondary steam can be directly recycled into the first adjustable heater, and a one-way valve is arranged between the pressure valve and the first adjustable heater, so that the secondary steam can not flow back, and the safety and the drying efficiency are ensured to realize primary heat energy recycling; when the internal air pressure of the first flash tank is smaller than the rated pressure of the first air pressure valve; the secondary steam pressure in the cylinder is insufficient, so that along with the discharge of the secondary steam on the first drying cylinder, the liquid in the first flash tank can only be led to the second flash tank along the pressure valve, and the liquid level of the second flash tank rises at the moment; if the temperature of the gas in the second flash tank is qualified, the second air pressure valve is opened, and the air in the second flash tank enters the second drying cylinder along with the second air pressure valve to realize further recycling of heat energy; if the gas temperature in the second flash tank is unqualified, the air pressure cannot reach the rated air pressure of the second air pressure valve, the second air pressure valve cannot be opened, the accumulated liquid in the flash tank is increased, the liquid pressure is increased, and the accumulated liquid is discharged along with a condensate pump to realize a recyclable heat recovery drying system; the problem that the secondary steam of the condensed water directly returns to the heating system, the stability in the heating system is reduced due to the fact that the temperature of the secondary steam is not high enough, and paper is not dried completely is solved effectively, and the processing quality of products is improved.
1. An ultrasonic air humidifier is arranged behind the second drying cylinder and atomizes water into 1-5 micron ultrafine particles by adopting ultrasonic high-frequency oscillation at the frequency of 1.7MHZ, so that the fine water mist can not wet the paper towel and can soften the paper towel, and the phenomena that the paper towel becomes brittle after being dried at high temperature and the brittle paper is damaged are effectively solved; and residual heat on the paper can remain on both the vacuum roll and the bottom roll. The slight humidity of the paper generated by the humidifier can be evaporated and dried without affecting the quality of the paper;
2. liquid level displays are arranged on the first flash tank and the second flash tank, so that the liquid levels in the first flash tank and the second flash tank can be effectively displayed, the phenomenon of insufficient stock solution is prevented, and the normal operation of equipment is ensured;
3. pressure regulating openings are formed in the first drying cylinder and the second drying cylinder, and when the air pressure inside the drying cylinder is larger than the rated air pressure of a pressure valve in the pressure regulating opening, the steam inside the drying cylinder can be discharged through the pressure regulating openings, so that the internal air pressure balance is realized. .
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921635801.XU CN210596817U (en) | 2019-09-26 | 2019-09-26 | A paper machine drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921635801.XU CN210596817U (en) | 2019-09-26 | 2019-09-26 | A paper machine drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210596817U true CN210596817U (en) | 2020-05-22 |
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ID=70714863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921635801.XU Expired - Fee Related CN210596817U (en) | 2019-09-26 | 2019-09-26 | A paper machine drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210596817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127200A (en) * | 2020-09-30 | 2020-12-25 | 湖北中烟工业有限责任公司 | A humidification system for humidifying inner lining paper with saturated steam |
| CN112490474A (en) * | 2020-11-26 | 2021-03-12 | 合肥科威尔电源系统股份有限公司 | Gas humidifying device of fuel cell system |
-
2019
- 2019-09-26 CN CN201921635801.XU patent/CN210596817U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127200A (en) * | 2020-09-30 | 2020-12-25 | 湖北中烟工业有限责任公司 | A humidification system for humidifying inner lining paper with saturated steam |
| CN112490474A (en) * | 2020-11-26 | 2021-03-12 | 合肥科威尔电源系统股份有限公司 | Gas humidifying device of fuel cell system |
| CN112490474B (en) * | 2020-11-26 | 2022-03-11 | 合肥科威尔电源系统股份有限公司 | Gas humidifying device of fuel cell system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |