CN104746376B - Head box intake air amount control device and control method thereof based on compressed air air blast - Google Patents
Head box intake air amount control device and control method thereof based on compressed air air blast Download PDFInfo
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- CN104746376B CN104746376B CN201510182622.5A CN201510182622A CN104746376B CN 104746376 B CN104746376 B CN 104746376B CN 201510182622 A CN201510182622 A CN 201510182622A CN 104746376 B CN104746376 B CN 104746376B
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- Prior art keywords
- head box
- air
- pressure
- stop valve
- valve
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/02—Head boxes of Fourdrinier machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/04—Head boxes of cylinder machines
Abstract
The invention discloses a kind of head box intake air amount control device based on compressed air air blast, including head box, air compressor machine, gas buffer tank, the gas outlet of air compressor machine is connected with head box by breather line, gas buffer tank is arranged between the gas outlet of air compressor machine and head box, it is provided with the first stop valve between gas buffer tank and the gas outlet of air compressor machine, between described gas buffer tank and head box, set gradually the second stop valve, the 3rd stop valve, pressure-regulating valve；The sidewall of described head box is respectively arranged with differential pressure liquid level transmitter up and down, and the bottom of described head box is provided with pressure transmitter, and described pressure-regulating valve, pressure transmitter, differential pressure liquid level transmitter are all connected with controller, and described controller is connected with and rushes liquid pump；The invention also discloses a kind of head box air input control method based on compressed air air blast, by the present invention can investment reduction cost, shorten the production and construction cycle, reduce power consumption, reduce the fault rate in system operation.
Description
Technical field
The invention belongs to the technical field of head box air inflow control, be specifically related to a kind of head box intake air amount control device based on compressed air air blast and control method thereof.
Background technology
Head box is as connecting " standby slurry send stream " and " sheet forming " two-part key hinge in paper machine, it controls in whole paper-making process and important.Control to head box air inflow in the past, rotating speed frequently with arrangements for speed regulation control roots blower is regulated, though this control mode is reasonable, but so in production and construction, need to buy speed regulator and roots blower, be also required to install supporting low pressure auxiliary equipment simultaneously, thus extra add cost of investment, extending the production and construction cycle, the operation of arrangements for speed regulation and roots blower simultaneously also increases the consumption of electric energy.
Content of the invention
In view of this, a kind of head box intake air amount control device based on compressed air air blast of offer and control method thereof are provided.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
The embodiment of the present invention provides a kind of head box intake air amount control device based on compressed air air blast, this system includes head box, air compressor machine, gas buffer tank, the gas outlet of described air compressor machine is connected with head box by breather line, described gas buffer tank is arranged between the gas outlet of air compressor machine and head box, it is provided with the first stop valve between described gas buffer tank and the gas outlet of air compressor machine, between described gas buffer tank and head box, set gradually the second stop valve, the 3rd stop valve, pressure-regulating valve；The sidewall of described head box is separately provided for the differential pressure liquid level transmitter of measurement slurry position up and down, the bottom of described head box is provided with the pressure transmitter for measuring stagnation pressure, described pressure-regulating valve, pressure transmitter, differential pressure liquid level transmitter are all connected with controller, and described controller is connected with and rushes liquid pump.
In such scheme, this system also includes the by-passing valve being positioned on assisted ventilation pipeline, and one end of described by-passing valve is arranged between the second stop valve and the 3rd stop valve, and the other end is arranged between pressure-regulating valve and head box.
In such scheme, described gas buffer tank is provided with Pressure gauge.
The embodiment of the present invention also provides a kind of head box air input control method based on compressed air air blast, the method is: before operation, open the first stop valve, the compressed air that air compressor machine is exported enters gas buffer tank, close by-passing valve, opening the second stop valve and the 3rd stop valve, the slurry position of head box is measured and fed back to differential pressure liquid level transmitter, sends into measurement signal in controller；Pressure transmitter measurement the stagnation pressure feeding back head box, and send into measurement signal in controller；When liquid level raises, described controller will export a control signal, regulate pressure-regulating valve so that the air inflow of head box increases；When liquid level reduces, described controller will export a control signal, regulate pressure-regulating valve so that the air inflow of head box reduces.
In such scheme, the method also includes: when, in running, described pressure-regulating valve breaks down or controller breaks down, and closes stop valve, opens by-passing valve, the air inflow of Non-follow control head box.
Compared with prior art, beneficial effects of the present invention:
1st, the present invention uses existing Air Compressor Equipment to head box air blast, utilizes the switch degree of regulation valve to control the air inflow of head box, thus investment reduction cost, shortens the production and construction cycle.
2nd, the present invention does not uses speed regulator and roots blower, only uses existing Air Compressor Equipment, so avoids the consumption to electric energy of speed regulator and roots blower in production run, greatly reducing power consumption, saved production cost.
3rd, the present invention only uses existing Air Compressor Equipment and regulation valve, it is to avoid the system instability that brings due to speed regulator and roots blower fault during production run, decreases the fault rate in system operation.
Brief description
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
The present invention is described in detail with detailed description of the invention below in conjunction with the accompanying drawings.
The embodiment of the present invention provides a kind of head box intake air amount control device based on compressed air air blast, as shown in Figure 1, this system includes head box the 7th, air compressor machine, gas buffer tank 4, the gas outlet of described air compressor machine is connected with head box 7 by breather line, described gas buffer tank 4 is arranged between the gas outlet of air compressor machine and head box 7, it is provided with the first stop valve 1 between described gas buffer tank 4 and the gas outlet of air compressor machine, between described gas buffer tank 4 and head box 7, set gradually the second stop valve the 2nd, the 3rd stop valve the 3rd, pressure-regulating valve 5；The sidewall of described head box 7 is separately provided for the differential pressure liquid level transmitter 8 of measurement slurry position up and down, the bottom of described head box 7 is provided with the pressure transmitter 9 for measuring stagnation pressure, described pressure-regulating valve the 5th, pressure transmitter the 9th, differential pressure liquid level transmitter 8 is all connected with controller 10, and described controller 10 is connected with and rushes liquid pump 11.
This system also includes the by-passing valve 6 being positioned on assisted ventilation pipeline, and one end of described by-passing valve 6 is arranged between the second stop valve 2 and the 3rd stop valve 3, and the other end is arranged between pressure-regulating valve 5 and head box 7.
It is provided with Pressure gauge on described gas buffer tank 4.
Before operation, open the first stop valve 1 so that the compressed air of air compressor machine output enters gas buffer tank 4, when the force value that the Pressure gauge on gas buffer tank 4 demonstrates reaches requirements, normally supply i.e. can to head box 7.
The embodiment of the present invention also provides a kind of head box air input control method based on compressed air air blast, the method is: before operation, open the first stop valve 1, the compressed air that air compressor machine is exported enters gas buffer tank 4, close by-passing valve 6, opening the second stop valve 2 and the 3rd stop valve 3, the slurry position of head box 7 is measured and fed back to differential pressure liquid level transmitter 8, sends into measurement signal in controller 10；The stagnation pressure of head box 7 is measured and fed back to pressure transmitter 9, and sends into measurement signal in controller 10；When liquid level raises, described controller 10 will export a control signal, regulate pressure-regulating valve 5 so that the air inflow of head box 7 increases；When liquid level reduces, described controller 10 will export a control signal, regulate pressure-regulating valve 5 so that the air inflow of head box 7 reduces,
When, in running, described pressure-regulating valve 5 breaks down or controller 10 breaks down, close stop valve 3, open by-passing valve 6, the air inflow of Non-follow control head box 7.
Described pressure-regulating valve 5 is main inlet control valve, and described by-passing valve 6 is for from regulation valve.
The above, only presently preferred embodiments of the present invention, it is not intended to limit protection scope of the present invention.
Claims (4)
1. the head box intake air amount control device based on compressed air air blast, it is characterized in that, this system includes head box (7), air compressor machine, gas buffer tank (4), the gas outlet of described air compressor machine is connected with head box (7) by breather line, described gas buffer tank (4) is arranged between the gas outlet of air compressor machine and head box (7), it is provided with the first stop valve (1) between described gas buffer tank (4) and the gas outlet of air compressor machine, the second stop valve (2) is set gradually between described gas buffer tank (4) and head box (7), 3rd stop valve (3), pressure-regulating valve (5)；The sidewall of described head box (7) is separately provided for the differential pressure liquid level transmitter (8) of measurement slurry position up and down, the bottom of described head box (7) is provided with the pressure transmitter (9) for measuring stagnation pressure, described pressure-regulating valve (5), pressure transmitter (9), differential pressure liquid level transmitter (8) are all connected with controller (10), and described controller (10) is connected with and rushes liquid pump (11)；
This system also includes the by-passing valve (6) being positioned on assisted ventilation pipeline, and one end of described by-passing valve (6) is arranged between the second stop valve (2) and the 3rd stop valve (3), and the other end is arranged between pressure-regulating valve (5) and head box (7).
2. the head box intake air amount control device based on compressed air air blast according to claim 1, it is characterised in that: it is provided with Pressure gauge on described gas buffer tank (4).
3. the head box air input control method based on compressed air air blast, it is characterized in that, the method is: before operation, open the first stop valve (1), the compressed air that air compressor machine is exported enters gas buffer tank (4), closes by-passing valve (6), opens the second stop valve (2) and the 3rd stop valve (3), the slurry position of head box (7) is measured and fed back to differential pressure liquid level transmitter (8), sends into measurement signal in controller (10)；The stagnation pressure of head box (7) is measured and fed back to pressure transmitter (9), and sends into measurement signal in controller (10)；When liquid level raises, described controller (10) will export a control signal, regulation pressure-regulating valve (5) so that the air inflow of head box (7) increases；When liquid level reduces, described controller (10) will export a control signal, regulation pressure-regulating valve (5) so that the air inflow of head box (7) reduces.
4. the head box air input control method based on compressed air air blast according to claim 3, it is characterized in that, the method also includes: when in running, described pressure-regulating valve (5) breaks down or controller (10) breaks down, close stop valve (3), open by-passing valve (6), the air inflow of Non-follow control head box (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510182622.5A CN104746376B (en) | 2015-04-17 | 2015-04-17 | Head box intake air amount control device and control method thereof based on compressed air air blast |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510182622.5A CN104746376B (en) | 2015-04-17 | 2015-04-17 | Head box intake air amount control device and control method thereof based on compressed air air blast |
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| Publication Number | Publication Date |
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| CN104746376A CN104746376A (en) | 2015-07-01 |
| CN104746376B true CN104746376B (en) | 2016-10-05 |
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| CN201510182622.5A Expired - Fee Related CN104746376B (en) | 2015-04-17 | 2015-04-17 | Head box intake air amount control device and control method thereof based on compressed air air blast |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758470B (en) * | 2017-02-09 | 2018-05-15 | 华南理工大学 | A kind of air cushion pressure regulating device of head box |
| CN106968122A (en) * | 2017-04-19 | 2017-07-21 | 潜江市乐水林纸科技开发股份有限公司 | A kind of pressafiner by-pass collar |
| CN109901432A (en) * | 2019-04-03 | 2019-06-18 | 天津中新智冠信息技术有限公司 | The control method and device of coal washery blower system |
| CN113217363A (en) * | 2021-04-19 | 2021-08-06 | 华海(北京)科技股份有限公司 | Air inlet adjusting device of multi-path control air compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU706478A1 (en) * | 1975-10-03 | 1979-12-30 | Украинский научно-исследовательский институт целлюлозно-бумажной промышленности | System for automatic control of head box with variable air cushion volume |
| GB2025088A (en) * | 1978-06-30 | 1980-01-16 | Centre Tech Ind Papier | Controlsystem for papermaking machien headbox |
| SU1124068A1 (en) * | 1975-10-07 | 1984-11-15 | Украинский научно-исследовательский институт целлюлозно-бумажной промышленности | System for automatic control of headbox with variable air pad volume |
| CN2833668Y (en) * | 2005-09-30 | 2006-11-01 | 陕西科技大学 | Pneumatic cushion type grout level control apparatus for head box |
| CN204644768U (en) * | 2015-04-17 | 2015-09-16 | 陕西科技大学 | A kind of head box intake air amount control device based on compressed air air blast |
-
2015
- 2015-04-17 CN CN201510182622.5A patent/CN104746376B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU706478A1 (en) * | 1975-10-03 | 1979-12-30 | Украинский научно-исследовательский институт целлюлозно-бумажной промышленности | System for automatic control of head box with variable air cushion volume |
| SU1124068A1 (en) * | 1975-10-07 | 1984-11-15 | Украинский научно-исследовательский институт целлюлозно-бумажной промышленности | System for automatic control of headbox with variable air pad volume |
| GB2025088A (en) * | 1978-06-30 | 1980-01-16 | Centre Tech Ind Papier | Controlsystem for papermaking machien headbox |
| CN2833668Y (en) * | 2005-09-30 | 2006-11-01 | 陕西科技大学 | Pneumatic cushion type grout level control apparatus for head box |
| CN204644768U (en) * | 2015-04-17 | 2015-09-16 | 陕西科技大学 | A kind of head box intake air amount control device based on compressed air air blast |
Non-Patent Citations (2)
| Title |
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| 气垫式流浆箱总压头的控制;李中春;《纸和造纸》;19981130(第06期);第24页 * |
| 气垫式流浆箱控制系统的改造;陆平;《中国造纸》;20081115(第11期);第74-75页 * |
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