CN102733243A - Hot-air drying system of paper machine - Google Patents
Hot-air drying system of paper machine Download PDFInfo
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- CN102733243A CN102733243A CN2011100880101A CN201110088010A CN102733243A CN 102733243 A CN102733243 A CN 102733243A CN 2011100880101 A CN2011100880101 A CN 2011100880101A CN 201110088010 A CN201110088010 A CN 201110088010A CN 102733243 A CN102733243 A CN 102733243A
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Abstract
The invention relates to a hot-air drying system of a paper machine. The hot-air drying system comprises a flash tank, a heat pump, a dry-side heat exchanger, a wet-side heat exchanger and connecting pipelines, wherein an air inlet of the dry-side heat exchanger and an air inlet of the wet-side heat exchanger are connected with a main steam inlet pipeline, air exhaust pipelines at air outlets are respectively connected with the flash tank, the heat pump is connected with the flash tank, a main steam pipeline of the heat pump is connected with a drying cylinder, and high-pressure steam is guided to spray by the main steam pipeline so as to guide secondary steam in the heat pump into the drying cylinder. Compared with the prior art, the hot-air drying system provided by the invention can reduce the steam usage amount of the heat exchangers, reduce the quantity of condensation water of the flash tank after the steam enters into the heat exchangers, improve and enhance the drying efficiency, and appropriately enhance the speed of the paper machine, thereby achieving the aims of increasing production and reducing cost.
Description
Technical field
The present invention relates to the papermaking dry field, especially relate to a kind of paper machine hot air drying system.
Background technology
In the prior art, paper machine hot air drying system is divided into the dry and direct admission drying of drying cylinder of heat exchanger gas hood, and gas hood is divided into again does side gas hood and wet side gas hood; According to the needs of producing the paper kind, generally need to do about the adjustment to 130 ℃ of side and wet side gas hood in the production, the drying cylinder initial steam pressure is usually at 0.28～0.36MPa;
The dry groundwork principle of gas hood is that the hot blast that produces in the utilization gas hood carries out the view picture drying to the wet web that advances drying cylinder, i.e. thermal convection current, and the part waste gas of from gas hood, drawing back can add the part fresh air, utilizes through the heat exchanger heat cycles once more; Drying cylinder admission drying mainly is to utilize dryer surface high temperature that the wet web that advances drying cylinder is carried out contact drying, the instant heating conduction; Generally, what utilize hot air drying system mainly is to high-speed paper machine and the paper machine of producing high quantitative (paper for daily use) paper kind,
OCP1# paper machine belongs to produces the high quantitatively type paper machine of paper for daily use always, mainly produces tissue and high quantitatively toilet paper etc., because the problem that design aspect exists, following puzzlement is arranged always: 1. drying efficiency is not high; 2. ton paper steam consumption is high, greater than 3.3 tons of vapour of the target steam consumption/ton paper, and about 3.35～3.50 tons of vapour/ton paper.
Summary of the invention
The object of the invention is exactly a kind of heat energy service efficiency that improves condensed water is provided in order to overcome the defective that above-mentioned prior art exists, reduces a ton paper steam use amount, improves the paper machine hot air drying system of the speed of paper machine.
The object of the invention can be realized through following technical scheme:
A kind of paper machine hot air drying system; It is characterized in that this system comprises flash tank, heat pump, dried side heat exchanger, wet side heat exchanger and connect pipeline that the air inlet of described dried side heat exchanger, wet side heat exchanger connects total steam inlet pipeline; The gas exhaust piping of gas outlet is connected with flash tank respectively; Described heat pump is connected with flash tank, and the major steam line of heat pump is connected with drying cylinder, and the high steam guiding fuel injection through major steam line is directed into drying cylinder with the indirect steam in the heat pump.
Described dried side heat exchanger and the tank connected gas exhaust piping of flash distillation are provided with the drain valve of inverted bucket.
The sidepiece of described drain valve is provided with bypass line.
Described wet side heat exchanger and the tank connected gas exhaust piping of flash distillation are provided with the drain valve of inverted bucket.
The sidepiece of described drain valve is provided with bypass line.
Described total steam inlet pipeline also directly is connected through pipeline with heat pump.
Compared with prior art, the present invention has the following advantages:
(1) reduces the steam use amount of heat exchanger, stablize the temperature requirements of gas hood, the heat energy service efficiency of the condensed water that the lifting heat exchanger comes out;
(2) reduce ton paper steam use amount by original 3.35～3.50 tons of vapour/ton paper, up till now 3.0～3.20 tons of vapour/ton paper;
(3) reduce the condensation water quantity of the flash tank after the heat exchanger admission, reduce flash tank and directly efflux and thermal waste;
(4) improve the admission of OCP1# drying cylinder by original gas hood heat exchanger master admission, the phenomenon of the auxilliary admission of total steam pipe; After the improvement, by total steam pipe high pressure high-quality steam master admission, the auxilliary admission of the indirect steam after the heat exchanger in the flash tank accomplishes to make a distinction between the important and the lesser one the caloic optimum utilization;
(5) improve and promote drying efficiency, can suitably improve the speed of paper machine, accomplish to increase production the result who falls this.
Description of drawings
Fig. 1 is a structural representation of the present invention.
1 is that total steam inlet pipeline, 2 for bypass line, 7 for flash tank, 8 for heat pump, 9 for major steam line, 10 is drying cylinder for drain valve, 6 for doing side heat exchanger, 4 for gas exhaust piping, 5 for wet side heat exchanger, 3 among the figure.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
A kind of paper machine hot air drying system; Its structure is as shown in Figure 1; This system comprises wet side heat exchanger 2, dried side heat exchanger 3, flash tank 7, heat pump 8 and connection pipeline, and the air inlet of wet side heat exchanger 2 and dried side heat exchanger 3 is connected total steam inlet pipeline 1, and the gas exhaust piping 4 of gas outlet is connected with flash tank 7 respectively; On this gas exhaust piping 4, be provided with the drain valve 5 of inverted bucket, and bypass line 6 be set at the sidepiece of drain valve 5.Total steam inlet pipeline 1 also directly is connected through pipeline with heat pump 8.Heat pump 8 is connected with flash tank 7, and the major steam line 9 of heat pump 8 is connected with drying cylinder, and the high steam guiding fuel injection through major steam line 9 is directed into drying cylinder 10 with the indirect steam in the heat pump.
The present invention transforms the process pipeline of wet side heat exchanger 2 and dried side heat exchanger 3, through rational lectotype selection, selects the drain valve 5 of two inverted buckets for use; Be installed in respectively on the exhaust line 4 of wet side heat exchanger 2 and dried side heat exchanger 3, and add bypass line 6, again this pipeline is connected on the flash tank 7; The operation principle of the hydrophobic resistance vapour through drain valve 5 reduces the admission flow of heat exchanger, promotes the intensification efficient of heat exchanger; Reduce the generation of condensed water, and in time drain in the flash tank 7, separate through the inside carbonated drink of flash tank 7 again through drain valve 5; Indirect steam gets into heat pump 8, through the high steam guiding fuel injection of major steam line 9, gets into drying cylinder 10; Guarantee the admission demand of drying cylinder 10, condensed water is discharged from the bottom of flash tank 7 and is got final product.
Claims (6)
1. paper machine hot air drying system; It is characterized in that this system comprises flash tank, heat pump, dried side heat exchanger, wet side heat exchanger and connect pipeline that the air inlet of described dried side heat exchanger, wet side heat exchanger connects total steam inlet pipeline; The gas exhaust piping of gas outlet is connected with flash tank respectively; Described heat pump is connected with flash tank, and the major steam line of heat pump is connected with drying cylinder, and the high steam guiding fuel injection through major steam line is directed into drying cylinder with the indirect steam in the heat pump.
2. a kind of paper machine hot air drying system according to claim 1 is characterized in that described dried side heat exchanger and the tank connected gas exhaust piping of flash distillation are provided with the drain valve of inverted bucket.
3. a kind of paper machine hot air drying system according to claim 2 is characterized in that the sidepiece of described drain valve is provided with bypass line.
4. a kind of paper machine hot air drying system according to claim 1 is characterized in that described wet side heat exchanger and the tank connected gas exhaust piping of flash distillation are provided with the drain valve of inverted bucket.
5. a kind of paper machine hot air drying system according to claim 4 is characterized in that the sidepiece of described drain valve is provided with bypass line.
6. a kind of paper machine hot air drying system according to claim 1 is characterized in that described total steam inlet pipeline also directly is connected through pipeline with heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110088010.1A CN102733243B (en) | 2011-04-08 | 2011-04-08 | Hot-air drying system of paper machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110088010.1A CN102733243B (en) | 2011-04-08 | 2011-04-08 | Hot-air drying system of paper machine |
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| Publication Number | Publication Date |
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| CN102733243A true CN102733243A (en) | 2012-10-17 |
| CN102733243B CN102733243B (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110088010.1A Active CN102733243B (en) | 2011-04-08 | 2011-04-08 | Hot-air drying system of paper machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334333A (en) * | 2013-06-25 | 2013-10-02 | 浙江荣晟环保纸业股份有限公司 | Improved device of drying cylinder |
| CN108570875A (en) * | 2017-03-13 | 2018-09-25 | 上海东冠纸业有限公司 | A kind of high grammes per square metre technology for making hand tissue of environment-friendly type |
| CN111304952A (en) * | 2018-12-11 | 2020-06-19 | 上海东冠纸业有限公司 | Steam condensate water system |
Citations (5)
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| FR2505034A1 (en) * | 1981-04-29 | 1982-11-05 | Bosch Siemens Hausgeraete | COMPRESSION REFRIGERATING MACHINE HAVING A SOLUTION CIRCUIT AND IN PARTICULAR FOR OPERATING AS A HEAT PUMP |
| US4780967A (en) * | 1986-04-17 | 1988-11-01 | Tch Thermo-Consulting-Heidelberg Gmbh | Apparatus for the recovery of waste heat contained in the exhaust from dryers of paper machines |
| CN2480406Y (en) * | 2001-06-05 | 2002-03-06 | 沈阳求达轻工机械有限公司 | High-speed toilet paper making machine |
| CN1995801A (en) * | 2006-12-21 | 2007-07-11 | 江苏地龙管业有限公司 | Urban heating direct-buried steam pipeline fitting integrated shaft |
| CN202017162U (en) * | 2011-04-08 | 2011-10-26 | 上海东冠纸业有限公司 | Hot-air drying system for production of household paper |
-
2011
- 2011-04-08 CN CN201110088010.1A patent/CN102733243B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2505034A1 (en) * | 1981-04-29 | 1982-11-05 | Bosch Siemens Hausgeraete | COMPRESSION REFRIGERATING MACHINE HAVING A SOLUTION CIRCUIT AND IN PARTICULAR FOR OPERATING AS A HEAT PUMP |
| US4780967A (en) * | 1986-04-17 | 1988-11-01 | Tch Thermo-Consulting-Heidelberg Gmbh | Apparatus for the recovery of waste heat contained in the exhaust from dryers of paper machines |
| CN2480406Y (en) * | 2001-06-05 | 2002-03-06 | 沈阳求达轻工机械有限公司 | High-speed toilet paper making machine |
| CN1995801A (en) * | 2006-12-21 | 2007-07-11 | 江苏地龙管业有限公司 | Urban heating direct-buried steam pipeline fitting integrated shaft |
| CN202017162U (en) * | 2011-04-08 | 2011-10-26 | 上海东冠纸业有限公司 | Hot-air drying system for production of household paper |
Non-Patent Citations (1)
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| 李阳春等: "热泵干燥系统几种循环的对比分析与研究", 《农业机械学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334333A (en) * | 2013-06-25 | 2013-10-02 | 浙江荣晟环保纸业股份有限公司 | Improved device of drying cylinder |
| CN103334333B (en) * | 2013-06-25 | 2015-08-26 | 浙江荣晟环保纸业股份有限公司 | A kind of modifying device of drying cylinder |
| CN108570875A (en) * | 2017-03-13 | 2018-09-25 | 上海东冠纸业有限公司 | A kind of high grammes per square metre technology for making hand tissue of environment-friendly type |
| CN108570875B (en) * | 2017-03-13 | 2021-04-09 | 上海东冠纸业有限公司 | Production process of environment-friendly high-gram-weight hand towel |
| CN111304952A (en) * | 2018-12-11 | 2020-06-19 | 上海东冠纸业有限公司 | Steam condensate water system |
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| Publication number | Publication date |
|---|---|
| CN102733243B (en) | 2015-05-20 |
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