CN205741757U - A kind of papermaking drying machine condensate drain - Google Patents
A kind of papermaking drying machine condensate drain Download PDFInfo
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- CN205741757U CN205741757U CN201620429722.3U CN201620429722U CN205741757U CN 205741757 U CN205741757 U CN 205741757U CN 201620429722 U CN201620429722 U CN 201620429722U CN 205741757 U CN205741757 U CN 205741757U
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Abstract
A kind of papermaking drying machine condensate drain, including first group of exhaust unit, second group of exhaust unit and the 3rd group of exhaust unit, often group exhaust unit all includes drying cylinder and flash tank, flash tank entrance is connected by condensing tube with the outlet of drying cylinder, the outlet of flash tank is at least connected with an exhaustor, exhaustor is provided with air bleeding valve, and flash tank is connected with next stage exhaust unit by exhaustor；The flash tank outlet of described 3rd group of exhaust unit is connected with heat pump the first import, and the second import of heat pump connects with high-pressure steam pipe, and the drying cylinder of hot delivery side of pump and the 3rd group of exhaust unit connects.A kind of papermaking drying machine condensate drain that this utility model provides, by arranging heat pump, can solve the problem that the 3rd group of problem that drying cylinder condensed water cannot be discharged, decrease transmission load, additionally the residual heat and steam in the 3rd group of drying cylinder condensed water can be carried out secondary recovery utilization.
Description
Technical field
This utility model relates to paper machine drying field, especially a kind of papermaking drying machine condensate drain.
Background technology
In existing paper machine drying system, drying cylinder condensed water is discharged by drying cylinder inlet and outlet pressure difference.Arranging flash tank between each drying cylinder, partial condensation water is dried for next group drying cylinder by being supplemented with part live steam after live steam flash distillation.In the process, there is a problem in that first group of import is live steam, first group of outlet residual air is supplemented with some vapor to second segment entrance, and second group exports residual air to last 3rd section of import.In the process, often because papermaking is the lowest, first group of pressure is little; and causing the 3rd group of inlet pressure the least, the 3rd group of drying cylinder condensed water row does not goes out, or; the 3rd group of condensed water water temperature discharged is higher, reaches 120C °, goes back entrainment portions steam residual air and be expelled directly out causing waste.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of papermaking drying machine condensate drain, can solve the problem that the 3rd group of problem that drying cylinder condensed water cannot be discharged, decrease transmission load, additionally the residual heat and steam in the 3rd group of drying cylinder condensed water can be carried out secondary recovery utilization.
For solving above-mentioned technical problem, this utility model be the technical scheme is that
A kind of papermaking drying machine condensate drain, including first group of exhaust unit, second group of exhaust unit and the 3rd group of exhaust unit, often group exhaust unit all includes drying cylinder and flash tank, flash tank entrance is connected by condensing tube with the outlet of drying cylinder, the outlet of flash tank is at least connected with an exhaustor, exhaustor is provided with air bleeding valve, and flash tank is connected with next stage exhaust unit by exhaustor；The flash tank outlet of described 3rd group of exhaust unit is connected with heat pump the first import, and the second import of heat pump connects with high-pressure steam pipe, and the drying cylinder of hot delivery side of pump and the 3rd group of exhaust unit connects.
Described often group is provided with pressure difference transmitter between the high-pressure steam pipe of exhaust unit and condensate pipe, pressure difference transmitter is sequentially connected with controller and air bleeding valve.
Described heat pump includes that the pump housing, the pump housing are provided with needle valve.
The outlet of the described pump housing is expansion pipe.
This utility model one papermaking drying machine condensate drain, has following technical effect that
1), solve rear portion drying cylinder drainage problem, decrease transmission load (average 30%), so solve because of when drying cylinder load reaches capacity because of driving protection halting problem (monthly 3-6 time, turn back on and lose 10,000 yuan) every time, improve drying cylinder heat transfer efficiency simultaneously.
2), when heat pump is in optimum Working, from the heat energy of 25% accounting for wastage in bulk or weight that drying cylinder is discharged, the heat energy having about 18% is fed again into drying cylinder utilize, the remaining low-pressure low-temperature condensed water through repeatedly flash distillation only about 7% heat energy seen off by terminal condensate pump, enable is fully utilized.
Accompanying drawing explanation
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the schematic diagram of heat pump in this utility model.
In figure: first group of exhaust unit 1, second group of exhaust unit 2, the 3rd group of exhaust unit 3, drying cylinder 4, flash tank 5, exhaustor 6, air bleeding valve 7, heat pump 8, pressure difference transmitter 9, controller 10, the pump housing 11, needle valve 12, the first import 13, the second import 14, export 15, high-pressure steam pipe 16.
Detailed description of the invention
As shown in Figure 1-2, a kind of papermaking drying machine condensate drain, including 1, second group of exhaust unit 2 of first group of exhaust unit and the 3rd group of exhaust unit 3, often group exhaust unit all includes drying cylinder 4 and flash tank 5, flash tank 5 entrance and the outlet of drying cylinder 4 are by cold, and solidifying pipe connects, and the outlet of flash tank 5 is connected with two each and every one exhaustors 6, each exhaustor 6 is provided with air bleeding valve 7, and flash tank 5 is connected with next stage exhaust unit by exhaustor 6；The flash tank outlet of described 3rd group of exhaust unit 3 is connected with heat pump 8 first import 13, and the second import 14 of heat pump 8 connects with high-pressure steam pipe 16, and the outlet 15 of heat pump 8 is connected with the drying cylinder of the 3rd group of exhaust unit 3.
Described often group is provided with pressure difference transmitter 9 between the high-pressure steam pipe of exhaust unit and condensate pipe, pressure difference transmitter 9 is sequentially connected with controller 10 and air bleeding valve 7.During work, when actual pressure differential value is less than setting value, opens an air bleeding valve, still do not reach required draining pressure reduction when opening first air bleeding valve, then open second air bleeding valve, until pressure reduction is maintained above setting value.
Described heat pump 8 includes that the pump housing 11, the pump housing 11 are provided with needle valve 12.The outlet 15 of the described pump housing 11 is expansion pipe.During work, fresh high steam (0.5MPa) is entered by the second import 14, it is mixed into diffuser pipe with the flash tank of the 3rd group of exhaust unit 3 condensed water out after needle valve 12 valve regulated size, high steam sprays the injection swabbing action that dilatation produces and gas-liquid mixture flashes off indirect steam is drawn in drying cylinder at this, mixed middle pressure steam is delivered to be used again in drying cylinder, saves high pressure steam system live steam consumption.
Operation principle and process: at the 3rd group of exhaust unit, heat pump is set, and by the high steam injection swabbing action of heat pump, the 3rd group of pressure that exhaust unit obtains in flash tank is made to reduce further, the indirect steam of flash distillation is more, the drying cylinder outlet pressure of the 3rd group of exhaust unit reduces further, can generally achieve negative pressure, draining differential pressure increases further, and three sections of drying cylinder drainings are unobstructed.
Claims (4)
1. a papermaking drying machine condensate drain, it is characterized in that: include first group of exhaust unit (1), second group of exhaust unit (2) and the 3rd group of exhaust unit (3), often group exhaust unit all includes drying cylinder (4) and flash tank (5), flash tank (5) entrance is connected by condensing tube with the outlet of drying cylinder (4), the outlet of flash tank (5) is at least connected with an exhaustor (6), exhaustor (6) is provided with air bleeding valve (7), and flash tank (5) is connected with next stage exhaust unit by exhaustor (6)；The flash tank outlet of described 3rd group of exhaust unit (3) is connected with first import (13) of heat pump (8), second import (14) of heat pump (8) connects with high-pressure steam pipe (16), and the outlet (15) of heat pump (8) is connected with the drying cylinder of the 3rd group of exhaust unit (3).
A kind of papermaking drying machine condensate drain the most according to claim 1, it is characterized in that: described often group is provided with pressure difference transmitter (9) between the high-pressure steam pipe of exhaust unit and condensate pipe, pressure difference transmitter (9) is sequentially connected with controller (10) and air bleeding valve (7).
A kind of papermaking drying machine condensate drain the most according to claim 1, it is characterised in that: described heat pump (8) includes that the pump housing (11), the pump housing (11) are provided with needle valve (12).
A kind of papermaking drying machine condensate drain the most according to claim 3, it is characterised in that: the outlet (15) of the described pump housing (11) is expansion pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620429722.3U CN205741757U (en) | 2016-05-12 | 2016-05-12 | A kind of papermaking drying machine condensate drain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620429722.3U CN205741757U (en) | 2016-05-12 | 2016-05-12 | A kind of papermaking drying machine condensate drain |
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| Publication Number | Publication Date |
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| CN205741757U true CN205741757U (en) | 2016-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620429722.3U Active CN205741757U (en) | 2016-05-12 | 2016-05-12 | A kind of papermaking drying machine condensate drain |
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| CN (1) | CN205741757U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221450A (en) * | 2016-12-21 | 2018-06-29 | 福伊特专利有限公司 | For running the method for heating group subsystem and heating group subsystem |
| CN108252150A (en) * | 2016-12-29 | 2018-07-06 | 上海东冠纸业有限公司 | A kind of energy-saving system of paper-making drying cylinder |
| CN108468246A (en) * | 2017-02-23 | 2018-08-31 | 合肥银山棉麻股份有限公司 | Copy dregs of rice drying cylinder set vapour heating device |
-
2016
- 2016-05-12 CN CN201620429722.3U patent/CN205741757U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221450A (en) * | 2016-12-21 | 2018-06-29 | 福伊特专利有限公司 | For running the method for heating group subsystem and heating group subsystem |
| CN108221450B (en) * | 2016-12-21 | 2019-11-12 | 福伊特专利有限公司 | For running the method and heating group subsystem of heating group subsystem |
| CN108252150A (en) * | 2016-12-29 | 2018-07-06 | 上海东冠纸业有限公司 | A kind of energy-saving system of paper-making drying cylinder |
| CN108252150B (en) * | 2016-12-29 | 2024-01-23 | 上海东冠纸业有限公司 | Energy-saving and consumption-reducing system of papermaking drying cylinder |
| CN108468246A (en) * | 2017-02-23 | 2018-08-31 | 合肥银山棉麻股份有限公司 | Copy dregs of rice drying cylinder set vapour heating device |
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