CN209798433U - Energy-saving high-temperature flue gas impact drying paper system - Google Patents
Energy-saving high-temperature flue gas impact drying paper system Download PDFInfo
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- CN209798433U CN209798433U CN201920305054.7U CN201920305054U CN209798433U CN 209798433 U CN209798433 U CN 209798433U CN 201920305054 U CN201920305054 U CN 201920305054U CN 209798433 U CN209798433 U CN 209798433U
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Abstract
The utility model discloses an energy-saving high-temperature flue gas impact drying paper system, which comprises a paper feeding roller, a guide roller group, a paper outlet roller and a drying device; the two ends of the guide roller group are respectively provided with a paper feeding roller and a paper discharging roller, the two sides of the guide roller group are respectively provided with a drying device, one is close to the paper feeding roller, and the other is close to the paper discharging roller; a circle of guide rollers are arranged in the drying device along the inner wall of the drying device; the drying device is an integral gas hood, one side of the drying device is a heating gas hood, the other side of the drying device is a suction gas hood, the suction gas hood is connected with a first heat exchanger, the first heat exchanger is connected with the boiler hot air, the first heat exchanger is connected with the heating gas hood, the heating gas hood is further provided with a natural gas pipeline which is connected with natural gas, and the first heat exchanger is connected with a second heat exchanger through a first variable frequency fan. The utility model provides high drying efficiency improves the productivity, and recycle flue gas waste heat has reduced paper mill manufacturing cost.
Description
Technical Field
The utility model belongs to the technical field of the hot technique of papermaking drying and specifically relates to an energy-saving high temperature flue gas strikes dry paper system.
Background
At present, the paper making industry develops rapidly, in order to effectively control the cost and reduce the emission of carbon dioxide, energy-saving reconstruction needs to be carried out on a high-energy-consumption working section, and a drying part of a paper machine is the working section with the largest energy consumption. Steam drying cylinders commonly used today use saturated steam as a heat source, which fills the interior of the cylinder and transfers heat to the cylinder surface to dry the paper sheet, primarily by heat transfer.
To improve the drying capacity, the steam pressure and temperature need to be increased or the diameter of the drying cylinder and the number of the drying cylinders need to be increased, and the improvement of the drying capacity of the steam drying cylinder is limited due to the limitation of the bearing capacity of the cast iron drying cylinder and the cost limitation caused by building a plant and increasing the length of a drying part.
In the traditional drying process of the steam drying cylinder, after the wet paper is heated on the surface of the drying cylinder, moisture in the wet paper escapes, a matched atmosphere cover is needed to recover the water and the heat of the water, meanwhile, the phenomenon that the water drops on the wet paper to affect the quality of finished paper is avoided, and the control of the workshop environment is relatively complex.
In the traditional steam drying cylinder drying process, wet paper is heated, water is dissipated in an atmosphere cover of a workshop and then is sucked by a fan, and the energy consumption of the fan is relatively high.
Disclosure of Invention
In order to solve the problem, the utility model aims at providing an energy-saving high temperature flue gas strikes dry paper system improves drying efficiency, improves the productivity, and recycle flue gas waste heat improves energy utilization and rates, has reduced paper factory manufacturing cost.
The utility model provides a technical scheme that above-mentioned problem adopted does: an energy-saving high-temperature flue gas impact paper drying system comprises a paper feeding roller, a guide roller set, a paper outlet roller and a drying device;
the two ends of the guide roller group are respectively provided with a paper feeding roller and a paper discharging roller, and the two sides of the guide roller group are respectively provided with a drying device, one is close to the paper feeding roller, and the other is close to the paper discharging roller; a circle of guide rollers are arranged in the drying device along the inner wall of the drying device; the drying device is an integral gas hood, one side of the drying device is a heating gas hood, the other side of the drying device is a suction gas hood, one ends of the heating gas hood and the suction gas hood are welded into a whole, and the other ends of the heating gas hood and the suction gas hood are respectively provided with a heating sealing roller and a suction sealing roller;
The extraction air cover is connected with a first heat exchanger, the first heat exchanger is connected with boiler hot air through a second variable frequency fan, the first heat exchanger is provided with a pipeline connected with a heating air cover to guide the boiler hot air into the heating air cover, the heating air cover is also provided with a natural gas pipeline connected with natural gas, the first heat exchanger is connected with a second heat exchanger through the first variable frequency fan, the second heat exchanger is connected with boiler water supply and goes to a white water heating section to further recover the waste heat of hot flue gas from the white water.
An energy-saving high-temperature flue gas impact drying paper system is characterized in that the inner wall of a heating gas hood is arc-shaped, the upper end and the lower end of each of two sides of the heating gas hood are respectively provided with a connecting hole, the heating gas hood is provided with a plurality of spray holes and guide pages at equal intervals along the arc-shaped inner wall, the outer wall of the heating gas hood is provided with hot air spray holes and high-energy ignition spray holes, and flame observation holes are formed between the hot air spray holes and the high-energy ignition spray holes; the high-energy ignition jet hole is connected with a high-energy igniter.
The utility model provides an energy-saving high temperature flue gas strikes dry paper system, the suction hood inner wall is the arc, the upper and lower both ends of suction hood both sides respectively are equipped with a apron connecting hole, the suction hood is equipped with a plurality of suction holes along arc inner wall equidistance.
the energy-saving high-temperature flue gas impact drying paper system is characterized in that cover plates are arranged outside the heating gas hood and the suction gas hood to seal the heating gas hood and the suction gas hood, and heat insulation layers are arranged on the surfaces of the cover plates.
the utility model provides an energy-saving high temperature flue gas strikes dry paper system, whole gas hood's middle welding position is provided with the clearance hole, the cover outer wall of breathing out is equipped with a clearance mouth.
the utility model provides an energy-saving high temperature flue gas strikes dry paper system, be provided with manometer and thermometer on the heating gas cover, be equipped with the manometer on the suction gas cover.
The pressure in the suction hood keeps negative pressure of 300-500pa, which can be measured by a pressure gauge, and the negative pressure is kept by a first variable frequency fan.
The wind speed of hot flue gas introduced into the heating gas hood is 80-100m/s, and the speed value is regulated by the rotating speed of a second variable frequency fan.
The utility model provides an energy-saving high temperature flue gas strikes dry paper system, first heat exchanger is equipped with the pipeline and is connected with the high energy point firearm on the heating gas cover, with the leading-in high energy point firearm on the heating gas cover of boiler hot-blast, the high energy point firearm on the heating gas cover is equipped with the natural gas pipeline and inserts the natural gas.
An energy-saving high-temperature flue gas impact drying paper system is characterized in that an electric regulating valve and a flowmeter are arranged on a natural gas pipeline close to a high-energy igniter.
Because of above-mentioned technical scheme's application, compared with the prior art, the utility model has the following beneficial effect:
1. The dry evaporation rate of traditional dryer is about 20 ~ 40kg water/(m 2. h), the utility model discloses a high temperature flue gas strikes dry paper system drying rate is its 2-5 times, drying efficiency has been improved, the productivity has been improved, utilize high temperature flue gas thermal shock, do not need long distance defeated steam conduit and relevant subassembly, the dry section length has been shortened, energy saving consumption and factory building construction investment, construction and maintenance cost have been reduced, the combined cost is low, easy operation simultaneously, it is more convenient to operate and maintain, because steam is not used, thereby the control of system can be independent of the boiler and become simple relatively.
2. The drying of each section of the utility model is independent and sealed by the gas hood, thereby increasing the retention time of hot flue gas in the whole gas hood, improving the drying effect, being beneficial to heat recovery and being convenient to control; meanwhile, the inner side wall surface of the gas hood is close to the wet paper, hot flue gas flows along the surface of the wet paper, suction holes are convenient to suck, the kinetic energy of the hot flue gas is utilized, and the energy consumption of a fan is reduced.
3. The utility model discloses adaptable different kind's paper or cardboard except can adjusting flue gas wind speed and wind-warm syndrome, can also adjust hot flue gas flow direction to reach better drying effect.
4. The utility model discloses utilize the hot flue gas after the hot-air mixing natural gas after the tail flue gas heating of paper mill self-contained biomass boiler or alkali recovery boiler burns to strike dry wet paper or cardboard from the paper machine press portion and come out, the exhaust is retrieved, utilizes the heat exchanger to preheat the hot-air and boiler feed water of boiler side respectively to finally send to plain boiled water heating workshop section heating plain boiled water, improved the waste heat utilization effect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the heating air hood of the present invention.
Fig. 3 is a schematic structural view of the suction hood of the present invention.
in the figure:
The device comprises an electric regulating valve 1, a flowmeter 2, a high-energy igniter 3, a heating air hood 4, a connecting hole 4.1, a heating sealing roller 4.3, a spray hole and guide vane 4.4, a hot air spray hole 4.5, a flame observation hole 4.6, a high-energy igniter spray hole 4.7, a cleaning hole 5, a suction air hood 7, a suction sealing roller 7.1, a cover plate connecting hole 7.2, a suction hole 7.4, a cleaning hole 7.5, a pressure gauge 8, a thermometer 9, a guide roller 11, a paper outlet roller 12, a heat-resistant blanket 13, a first heat exchanger 14, a first variable-frequency fan 15, a second heat exchanger 16, a second variable-frequency fan 17 and a paper inlet roller 18.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1:
Referring to fig. 1-3, an energy-saving high-temperature flue gas impingement drying paper system comprises a paper feeding roller 18, a guide roller group, a paper outlet roller 12 and a drying device.
The two ends of the guide roller group are respectively provided with a paper feeding roller 18 and a paper discharging roller 12, the two sides of the guide roller group are respectively provided with a drying device, the drying devices on the two sides are arranged in tandem, one is close to the paper feeding roller 18, and the other is close to the paper discharging roller 12; the drying device is provided with a ring of guide rolls 11 along its inner wall to facilitate the introduction of the wet paper.
Drying device is a whole gas hood, and one side is heating gas hood 4, and one side is for sucking gas hood 7, the one end welding of heating gas hood 4 and suction gas hood 7 is whole, and the other end is equipped with respectively and adds heat seal roller 4.3 and suction seal roller 7.1, the outside of heating gas hood 4 and suction gas hood 7 all sets up the apron and seals it, and the apron surface is equipped with the heat preservation, the middle welding position of whole gas hood is provided with clearance hole 5 to it is inboard to open the clearance gas hood regularly.
the inner wall of the heating air hood 4 is arc-shaped, so that wet paper can be conveniently attached, the upper end and the lower end of each of two sides of the heater hood 4 are respectively provided with a connecting hole 4.1, the heating air hood 4 is provided with a plurality of spray holes and guide pages 4.4 at equal intervals along the arc-shaped inner wall, the outer wall of the heating air hood 4 is provided with a hot air spray hole 4.5 and a high-energy ignition spray hole 4.7, and a flame observation hole 4.6 is arranged between the hot air spray hole 4.5 and the high-energy ignition spray hole 4.7; the high-energy ignition jet hole 4.7 is connected with a high-energy igniter 3.
The inner wall of the suction hood 7 is arc-shaped, the upper end and the lower end of the two sides of the suction hood 7 are respectively provided with a cover plate connecting hole 7.2, the suction hood 7 is provided with a plurality of suction holes 7.4 along the arc-shaped inner wall at equal intervals, the outer wall of the suction hood 7 is provided with a cleaning port 7.5 to regularly clean the inside of the suction hood 7 and reduce the suction power consumption of the first variable frequency fan 15.
the heating gas hood 4 is provided with a pressure gauge 8 and a thermometer 9, and the suction gas hood 7 is provided with the pressure gauge 8.
The pressure in the suction hood 4 is kept at negative pressure 300-.
The suction hood 7 is connected with a first heat exchanger 14, the first heat exchanger 14 is connected with boiler hot air through a second variable frequency fan 17, the first heat exchanger 14 is provided with a pipeline connected with the high-energy igniter 3 to guide the boiler hot air into the high-energy igniter 3, the wind speed of the guided hot flue gas is about 90m/s, and the regulation of the speed value depends on the rotating speed of the second variable frequency fan 17; the high-energy igniter 3 is also provided with a natural gas pipeline for natural gas access, and the positions, close to the high-energy igniter 3, on the natural gas pipeline are provided with an electric regulating valve 1 and a flowmeter 2; the first heat exchanger 14 is connected with a second heat exchanger 16 through a first variable frequency fan 15, and the second heat exchanger 16 is connected with boiler feed water and is sent to a white water heating section to heat white water so as to further recover waste heat of hot flue gas.
The working principle is as follows:
Wet paper or paperboard enters the system through a paper feeding roller, is diverted by a guide roller, attaches a heat-resistant blanket to the wet paper, advances by wrapping the wet paper with the blanket, avoids the paper from deforming and tearing, is guided by the heat-resistant blanket to enter a drying device, uses hot flue gas as a drying medium for the drying device, consists of hot air at the side of a boiler and combustion flue gas of natural gas, and can reach the temperature by afterburning of the natural gas as the temperature of the hot air is about 200 ℃ and the temperature of the drying air needs to reach about 400 ℃; the natural gas flow adjusts the opening of a valve according to the temperature of the hot flue gas so as to maintain the temperature of the hot flue gas within a certain range, and the temperature of the flue gas is measured by a thermometer; the temperature of hot smoke required by different drying sections is different, and the value of the temperature is determined according to different paper types; the paper or the paperboard is dried by hot smoke impact in a closed space, and the hot smoke is recycled.
The wet paper firstly enters the heating air hood, hot smoke is sprayed out from the rectangular spray holes and changes direction to impact the wet paper through the guide page, and the guide page is adjusted to change the smoke direction so as to achieve better drying effect on different types of paper or paperboards; the natural gas is ignited by the high-energy igniter, the air quantity of the hot air required by the combustion of the natural gas can be adjusted by the manual valve on the pipeline, and the ignition effect can be observed through the flame observation hole on the heating gas cover. The heated smoke mixed with the moisture escaped from the wet paper by heating enters a suction hood to be sucked, the suction hood sucks hot smoke for recycling, and meanwhile, the sealing roller is utilized to reduce the dissipation of the hot smoke and improve the energy-saving effect; the dry paper leaves the system by exit rollers. In the heating process of the wet paper, the heat-resistant felt needs to change the attached paper surface so as to dry both sides of the paper. The mixed gas sucked by the suction hood heats hot air sent from the boiler side in the first heat exchanger, the recovered hot flue gas performs countercurrent heat exchange with the hot air in the first heat exchanger, then the boiler water is preheated in the second heat exchanger, and finally the hot flue gas is sent to a paper making white water heating section to heat white water so as to further improve the waste heat recovery effect.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides an energy-saving high temperature flue gas strikes dry paper system which characterized in that: the paper feeding device comprises a paper feeding roller, a guide roller set, a paper outlet roller and a drying device;
The two ends of the guide roller group are respectively provided with a paper feeding roller and a paper discharging roller, and the two sides of the guide roller group are respectively provided with a drying device, one is close to the paper feeding roller, and the other is close to the paper discharging roller; a circle of guide rollers are arranged in the drying device along the inner wall of the drying device; the drying device is an integral gas hood, one side of the drying device is a heating gas hood, the other side of the drying device is a suction gas hood, one ends of the heating gas hood and the suction gas hood are welded into a whole, and the other ends of the heating gas hood and the suction gas hood are respectively provided with a heating sealing roller and a suction sealing roller;
The extraction air cover is connected with a first heat exchanger, the first heat exchanger is connected with boiler hot air through a second variable frequency fan, the first heat exchanger is provided with a pipeline connected with a heating air cover to guide the boiler hot air into the heating air cover, the heating air cover is also provided with a natural gas pipeline connected with natural gas, the first heat exchanger is connected with a second heat exchanger through the first variable frequency fan, the second heat exchanger is connected with boiler water supply and goes to a white water heating section to further recover the waste heat of hot flue gas from the white water.
2. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 1, wherein: the inner wall of the heating air hood is arc-shaped, the upper end and the lower end of each of two sides of the heating air hood are respectively provided with a connecting hole, the heating air hood is provided with a plurality of spray holes and guide vanes at equal intervals along the arc-shaped inner wall, the outer wall of the heating air hood is provided with hot air spray holes and high-energy ignition spray holes, and flame observation holes are formed between the hot air spray holes and the high-energy ignition spray holes; the high-energy ignition jet hole is connected with a high-energy igniter.
3. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 1, wherein: the suction hood inner wall is the arc, the upper and lower both ends of suction hood both sides respectively are equipped with a apron connecting hole, the suction hood is equipped with a plurality of suction holes along arc inner wall equidistance.
4. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 1, wherein: the heating air hood and the suction air hood are respectively provided with a cover plate outside to seal the heating air hood and the suction air hood, and the surface of the cover plate is provided with a heat preservation layer.
5. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 1, wherein: the middle welding position of the whole gas hood is provided with a cleaning hole, and the outer wall of the suction gas hood is provided with a cleaning opening.
6. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 1, wherein: the heating hood is provided with a pressure gauge and a thermometer, and the suction hood is provided with a pressure gauge.
7. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 6, wherein: the pressure in the suction hood is kept at 300-500pa, which can be measured by a pressure gauge, and the negative pressure is kept by the first variable frequency fan.
8. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 1, wherein: the wind speed of the hot flue gas introduced into the heating gas hood is 80-100m/s, and the speed value is regulated by the rotating speed of the second variable frequency fan.
9. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 2, wherein: the first heat exchanger is provided with a pipeline connected with a high-energy igniter on the heating gas cover, hot air of the boiler is guided into the high-energy igniter on the heating gas cover, and the high-energy igniter on the heating gas cover is provided with a natural gas pipeline connected with natural gas.
10. The energy-saving high-temperature flue gas impact drying paper system as claimed in claim 2, wherein: and electric regulating valves and flow meters are arranged on the natural gas pipeline close to the high-energy igniter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920305054.7U CN209798433U (en) | 2019-03-12 | 2019-03-12 | Energy-saving high-temperature flue gas impact drying paper system |
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| CN201920305054.7U CN209798433U (en) | 2019-03-12 | 2019-03-12 | Energy-saving high-temperature flue gas impact drying paper system |
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| CN209798433U true CN209798433U (en) | 2019-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853288A (en) * | 2019-03-12 | 2019-06-07 | 江苏双良低碳产业技术研究院有限公司 | A kind of energy-saving type high-temperature smoke-shock dry paper system |
-
2019
- 2019-03-12 CN CN201920305054.7U patent/CN209798433U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853288A (en) * | 2019-03-12 | 2019-06-07 | 江苏双良低碳产业技术研究院有限公司 | A kind of energy-saving type high-temperature smoke-shock dry paper system |
| CN109853288B (en) * | 2019-03-12 | 2024-04-02 | 江苏双良低碳产业技术研究院有限公司 | Energy-saving high-temperature flue gas impact drying paper system |
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