CN204455704U - The steam and condensate system of heat pump heat supply - Google Patents
The steam and condensate system of heat pump heat supply Download PDFInfo
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- CN204455704U CN204455704U CN201420698916.4U CN201420698916U CN204455704U CN 204455704 U CN204455704 U CN 204455704U CN 201420698916 U CN201420698916 U CN 201420698916U CN 204455704 U CN204455704 U CN 204455704U
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Abstract
The utility model discloses a kind of steam and condensate system of heat pump heat supply, for the evaporation drying of l Water Paper, it comprises drying section and rear drying section, drying section comprises multiple steam-water separator, rear drying section comprises warm cylinder group and a high temperature cylinders group in a low temperature cylinder group, the low temperature cylinder group of rear drying section is connected with one of them steam-water separator of drying section, by low temperature drying cylinder blow logical steam and condensed water is discharged in the steam-water separator of drying section; The upstream of low temperature cylinder group increases scattered control system, for separately controlling the initial steam pressure of drying section and rear drying section.The utility model possesses admission hand valve, the cylinder surface temperature that need not open or close drying cylinder and evenly decreases the features such as the generation of drying cylinder paper wrapping between normal production period, therefore safer, improve paper machine efficiency, economize energy and improve paper grades, thus obtaining the highest paper machine efficiency and minimum energy-output ratio.
Description
Technical field
The utility model relates to pulping and paper-making field, especially relates to a kind of steam and condensate system of the heat pump heat supply for Dryer Section of Paper Machine.
Background technology
The drying section of current domestic all kinds of paper machine generally adopts the conventional thermodynamic system of single hop, two sections or three sections logical way of steam, cause waste hot steam exhaust emission environment, drying cylinder accumulates steam condensate (SC), the ton paper steam consumption is high, affecting paper machine improve the speed of a motor vehicle and improve the quality of products, is current paper industry ubiquity and urgent problem.
The operation principle of the drying section of paper machine is: after press section, and in paper industry, residual moisture must remove in Dryer Section of Paper Machine evaporation.Evaporation process needs a large amount of heat energy, usually supplies in vapour form.Drying section be generally consume energy in paper maximum.The main drying mode of Dryer Section of Paper Machine is contact drying, is the heat and mass transfer process of a more complicated.Dry run can be divided into the three phases such as drying, constant rate of drying, all even speed change falling-rate periods of drying that heat up.The moisture change of intensification drying stage is little, and because the heat energy supply in this stage is greater than thermal energy consumption, the temperature of l Water Paper and rate of drying increase very fast.Constant rate drying period accounts for 50% ~ 60% of paper machine whole drying time, mainly removes the free water in l Water Paper.At this one-phase, the vapor partial pressure of the projecting air far away of the steam pressure in page, mass transfer power increases, and thermal energy consumption increases, and will occur the poised state of the heat dissipation of heat supply and heat dissipation.Falling rate drying period mainly evaporates capillary water in page and Bound moisture, and in order to overcome capillary constraint, heat for improving the consumption of Molecule Motion the subject of knowledge and the object of knowledge can increase, and the poised state between heat supply and heat dissipation is broken, and evaporation rate reduces.At this one-phase, it is uniform that the rate of drying in its early stage declines, and page temperature there will be decline phenomenon; There is because evaporating the minimizing of heat consumption the speed change reduction of speed phenomenon that downward trend slows down in the rate of drying in later stage, page is stable there will be rise, is conducive to evaporation and the diffusion of residual moisture in page.
According to the dry process mechanism of above-mentioned paper web, for the l Water Paper of different cultivars, different basis weights, the steam of different grade should be supplied at different drying stages.For this reason, common practices carries out segmentation (as being divided into three drying cylinder sections such as low pressure, medium and high pressure) to the drying cylinder of drying section by the height of required steam pressure, forms the dryer temperature curve meeting drying process requirement.Because high-pressure section is when drying, in drying cylinder, produce a large amount of condensed water; Condensed water elimination easily causes drying cylinder ability to decline not in time, the waste of steam when rising of steam energy consumption and manual drain.
Utility model content
The purpose of this utility model is the defect overcoming prior art, a kind of steam and condensate system of heat pump heat supply is provided, heat pump, differential pressure control valve, scattered control system etc. are added, to improve paper machine efficiency, economize energy and raising paper grades in original system.
For achieving the above object, the utility model proposes following technical scheme: a kind of steam and condensate system of heat pump heat supply, comprise drying section and rear drying section, described drying section comprises multiple steam-water separator, described rear drying section comprises warm cylinder group and a high temperature cylinders group in a low temperature cylinder group, the low temperature cylinder group of described rear drying section is connected with one of them steam-water separator of described drying section, by low temperature drying cylinder blow logical steam and condensed water is discharged in the steam-water separator of described drying section; The upstream of described low temperature cylinder group increases scattered control system, for separately controlling the initial steam pressure of described drying section and rear drying section.
Preferably, the high temperature cylinders group of drying section installs heat pump in the rear.
Preferably, arrange differential pressure control valve in the admission portion of described high temperature cylinders group, described heat pump one end is connected with described high temperature cylinders group, and the other end is connected with described differential pressure control valve.
Preferably, described middle temperature cylinder group is between described low temperature cylinder group and described high temperature cylinders group.
Preferably, described low temperature cylinder group is made up of 2 drying cylinders, and described middle temperature cylinder group is made up of 8 drying cylinders, and described high temperature cylinders group is made up of 14 drying cylinders.
Preferably, described rear drying section also comprises multiple steam-water separator.
Preferably, described drying section also comprises multiple cylinder group.
Preferably, described drying section comprises the first cylinder group, the second cylinder group, the 3rd cylinder group and the 4th cylinder group, described second cylinder group, the 3rd cylinder group and the 4th cylinder group respectively connect steam-water separator described in, and the low temperature cylinder group of described rear drying section is connected with the steam-water separator of described second cylinder group.
The beneficial effects of the utility model are: native system possesses admission hand valve, the cylinder surface temperature that need not open or close drying cylinder and evenly decreases the features such as the generation of drying cylinder paper wrapping between normal production period, therefore safer, improve paper machine efficiency, economize energy and improve paper grades, thus obtaining the highest paper machine efficiency and minimum energy-output ratio.
Accompanying drawing explanation
Fig. 1 is the local principle schematic of the steam and condensate system of the utility model heat pump heat supply;
Reference numeral: 1, scattered control system, 2, heat pump, 3, differential pressure control valve.
Detailed description of the invention
Below in conjunction with accompanying drawing of the present utility model, clear, complete description is carried out to the technical scheme of the utility model embodiment.
The steam and condensate system of a kind of heat pump heat supply that the utility model discloses, comprise drying section and rear drying section, wherein drying section comprises multiple cylinder group and multiple steam-water separator, cylinder group is the first cylinder group, the second cylinder group, the 3rd cylinder group and the 4th cylinder group respectively, and each cylinder group respectively connects a steam-water separator.Wherein, the first cylinder group is made up of 2 drying cylinders, and the second cylinder group is made up of 5 drying cylinders, and the first cylinder group is made up of 7 drying cylinders, and the first cylinder group is made up of 19 drying cylinders.
As shown in Figure 1, rear drying section comprises warm cylinder group and a high temperature cylinders group in a low temperature cylinder group, low temperature cylinder group is made up of 2 drying cylinders, low temperature cylinder group is connected with the steam-water separator of the second cylinder group, for by low temperature drying cylinder blow logical steam and condensed water is discharged in the steam-water separator of the second cylinder group, reduce the quantity of low temperature drying cylinder, isolatedly blow logical steam and deliver in the drying cylinder of the first cylinder group and recycle.
In order to improve the runnability of rear drying section, the utility model increases scattered control system 1 in the upstream of low temperature cylinder group, drying section and rear drying section are separately controlled initial steam pressure, and the change of the recent pressure of main steam group drying cylinder of the front and back drying section caused when grammes per square metre, speed of a motor vehicle change like this would not influence each other.
The utility model is warm cylinder group in rear drying section increases, middle temperature cylinder group is between low temperature cylinder group and high temperature cylinders group, what be used for consuming high temperature cylinders blows logical steam, and what this group drying cylinder was discharged blow logical steam delivers in low temperature drying cylinder and use, and is conducive to the control that page heats up like this.Middle temperature cylinder group is made up of 8 drying cylinders, and high temperature cylinders group is made up of 14 drying cylinders.
The high temperature cylinders group of rear drying section is provided with heat pump 2, according to the calculating to the different speed of a motor vehicle of production, grammes per square metre page drying cylinder initial steam pressure, when producing lightweight paper page, the recent pressure of rear drying section high temperature cylinders is very low, the service requirement that multistage leads to vapour system can not be met, therefore in high temperature cylinders group, heat pump is installed and solves this problem.
During for production high grammes per square metre page, the initial steam pressure of high temperature cylinders is very high, vapour source pressure is only again 5 bar, can not meet heat pump 2 service requirement, so installed differential pressure control valve 3 in the admission portion of high temperature cylinders group, heat pump 2 one end has been connected with high temperature cylinders group, the other end is connected with differential pressure control valve 3, when high temperature cylinders group initial steam pressure height, differential pressure control valve door works, and can meet the needs of high temperature cylinders draining differential pressure; When high temperature cylinders group initial steam pressure is low, open at differential pressure control valve 3, when meeting the differential pressure requirement of cloth Shandong drying cylinder, heat pump 2 continues to open operation, just can solve this problem.
Technology contents of the present utility model and technical characteristic have disclosed as above; but those of ordinary skill in the art still may do all replacement and the modification that do not deviate from the utility model spirit based on teaching of the present utility model and announcement; therefore; the utility model protection domain should be not limited to the content that embodiment discloses; and various do not deviate from replacement of the present utility model and modification should be comprised, and contained by present patent application claim.
Claims (10)
1. the steam and condensate system of a heat pump heat supply, comprise drying section and rear drying section, it is characterized in that, described drying section comprises multiple steam-water separator, described rear drying section comprises warm cylinder group and a high temperature cylinders group in a low temperature cylinder group, the low temperature cylinder group of described rear drying section is connected with one of them steam-water separator of described drying section, by low temperature drying cylinder blow logical steam and condensed water is discharged in the steam-water separator of described drying section; The upstream of described low temperature cylinder group increases scattered control system, for separately controlling the initial steam pressure of described drying section and rear drying section.
2. the steam and condensate system of heat pump heat supply according to claim 1, is characterized in that, the high temperature cylinders group of drying section installs heat pump in the rear.
3. the steam and condensate system of heat pump heat supply according to claim 2, is characterized in that, arranges differential pressure control valve in the admission portion of described high temperature cylinders group, and described heat pump one end is connected with described high temperature cylinders group, and the other end is connected with described differential pressure control valve.
4. the steam and condensate system of heat pump heat supply according to claim 1, is characterized in that, described middle temperature cylinder group is between described low temperature cylinder group and described high temperature cylinders group.
5. the steam and condensate system of heat pump heat supply according to claim 1, is characterized in that, described low temperature cylinder group is made up of 2 drying cylinders.
6. the steam and condensate system of heat pump heat supply according to claim 1, is characterized in that, described middle temperature cylinder group is made up of 8 drying cylinders.
7. the steam and condensate system of heat pump heat supply according to claim 1, is characterized in that, described high temperature cylinders group is made up of 14 drying cylinders.
8. the steam and condensate system of heat pump heat supply according to claim 1, is characterized in that, described rear drying section also comprises multiple steam-water separator.
9. the steam and condensate system of heat pump heat supply according to claim 1, is characterized in that, described drying section also comprises multiple cylinder group.
10. the steam and condensate system of the heat pump heat supply according to claim 1 or 9, it is characterized in that, described drying section comprises the first cylinder group, the second cylinder group, the 3rd cylinder group and the 4th cylinder group, each described cylinder group respectively connects steam-water separator described in, and the low temperature cylinder group of described rear drying section is connected with the steam-water separator of described second cylinder group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698916.4U CN204455704U (en) | 2014-11-20 | 2014-11-20 | The steam and condensate system of heat pump heat supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698916.4U CN204455704U (en) | 2014-11-20 | 2014-11-20 | The steam and condensate system of heat pump heat supply |
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| Publication Number | Publication Date |
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| CN204455704U true CN204455704U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420698916.4U Active CN204455704U (en) | 2014-11-20 | 2014-11-20 | The steam and condensate system of heat pump heat supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724155A (en) * | 2017-09-08 | 2018-02-23 | 湖北金庄科技再生资源有限公司 | Papermaking dry device and control method |
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2014
- 2014-11-20 CN CN201420698916.4U patent/CN204455704U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107724155A (en) * | 2017-09-08 | 2018-02-23 | 湖北金庄科技再生资源有限公司 | Papermaking dry device and control method |
| CN107724155B (en) * | 2017-09-08 | 2018-06-19 | 湖北金庄科技再生资源有限公司 | The control method of papermaking dry device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314204, Jiaxing, Zhejiang City, Dushan province Pinghu town Gang Weng Jin Hua section No. 1 Patentee after: Rongcheng Pinghu Environmental Protection Technology Co., Ltd. Address before: 314204, Jiaxing, Zhejiang City, Dushan province Pinghu town Gang Weng Jin Hua section No. 1 Patentee before: Long Chen Paper Co., Ltd. |