CN104746376A - Compressed air blast based head-box air inlet control system and method - Google Patents
Compressed air blast based head-box air inlet control system and method Download PDFInfo
- Publication number
- CN104746376A CN104746376A CN201510182622.5A CN201510182622A CN104746376A CN 104746376 A CN104746376 A CN 104746376A CN 201510182622 A CN201510182622 A CN 201510182622A CN 104746376 A CN104746376 A CN 104746376A
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- Prior art keywords
- head box
- air
- pressure
- box
- stop 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 compressed air blast based head-box air inlet control system. The compressed air blast based head-box air inlet control system comprises a head-box, an air compressor and a gas buffer tank; an air outlet of the air compressor is communicated with the head-box through an air duct; the gas buffer tank is arranged between the air outlet of the air compressor and the head-box; a first stop valve is arranged between the gas buffer tank and the air outlet of the air compressor; a second stop valve, a third stop valve and a pressure regulating valve are arranged between the gas buffer tank and the head-box; differential pressure liquid level transmitters are arranged on the upper portion and the lower portion of the side wall of the head-box respectively; the bottom of the head-box is provided with a pressure transmitter; the pressure regulating valve, the pressure transmitter and the differential pressure liquid level transmitters are connected with a controller; the controller is connected with a charging pump. The invention also discloses a compressed air blast based head-box air inlet control method. According to the compressed air blast based head-box air inlet control system and method, the investment cost can be saved, the production and construction period can be shortened, the power consumption can be reduced, and the failure rate in the process of system operation can be reduced.
Description
Technical field
The invention belongs to the technical field that head box air inflow controls, 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 connects " standby slurry send stream " and " sheet forming " two-part crucial hinge as in paper machine, and it to control in whole paper-making process and important.In the past to the control of head box air inflow, the rotating speed that normal employing arrangements for speed regulation control roots blower regulates, though this control mode is reasonable, but like this in production and construction, need to buy speed regulator and roots blower, also need supporting low pressure auxiliary equipment is installed simultaneously, add cost of investment with regard to extra like this, extend the production and construction cycle, the operation of arrangements for speed regulation and roots blower simultaneously also increases the consumption of electric energy.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of head box intake air amount control device based on compressed air air blast and control method thereof.
For achieving the above object, technical scheme of the present invention is 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 comprises head box, air compressor machine, gas buffer tank, the gas outlet of described air compressor machine is communicated with head box by breather line, described gas buffer tank is arranged between the gas outlet of air compressor machine and head box, be 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 respectively arranged with the differential pressure liquid level transmitter for measuring 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 comprises the by-passing valve be 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, open the second stop valve and the 3rd stop valve, differential pressure liquid level transmitter is measured and is fed back the slurry position of head box, is sent into by measuring-signal in controller; Pressure transmitter measurement also feeds back the stagnation pressure of head box, and sends in controller by measuring-signal; When liquid level raises, described controller, by output control signal, regulates pressure-regulating valve, the air inflow of head box is increased; When liquid level reduces, described controller, by output control signal, regulates pressure-regulating valve, the air inflow of head box is reduced.
In such scheme, the method also comprises: when in running, and 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 effect of the present invention:
1, the present invention uses existing Air Compressor Equipment to head box air blast, utilizes the switch degree of control valve to control the air inflow of head box, like this with regard to investment reduction cost, shortens the production and construction cycle.
2, the present invention does not use speed regulator and roots blower, only uses existing Air Compressor Equipment, just avoids speed regulator and roots blower like this to the consumption of electric energy, greatly reducing power consumption, saved production cost in production run.
3, the present invention only uses existing Air Compressor Equipment and control valve, avoids the system instability brought due to speed regulator and roots blower fault in production run process, decreases the fault rate in system operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
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 comprises head box 7, air compressor machine, gas buffer tank 4, the gas outlet of described air compressor machine is communicated 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, be 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 2, the 3rd stop valve 3, pressure-regulating valve 5; The sidewall of described head box 7 is respectively arranged with the differential pressure liquid level transmitter 8 for measuring slurry position up and down, the bottom of described head box 7 is provided with the pressure transmitter 7 for measuring stagnation pressure, described pressure-regulating valve 5, pressure transmitter 7, 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 comprises the by-passing valve 6 be 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.
Described gas buffer tank 4 is provided with Pressure gauge.
Before operation, open the first stop valve 1, the compressed air that air compressor machine is exported enters gas buffer tank 4, when the force value that the Pressure gauge on gas buffer tank 4 demonstrates reaches requirements, namely can give the normal air feed of 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, open the second stop valve 2 and the 3rd stop valve 3, differential pressure liquid level transmitter 8 is measured and is fed back the slurry position of head box 7, is sent into by measuring-signal in controller 10; Pressure transmitter 9 is measured and is fed back the stagnation pressure of head box 7, and is sent into by measuring-signal in controller 10; When liquid level raises, described controller 10, by output control signal, regulates pressure-regulating valve 5, the air inflow of head box 7 is increased; When liquid level reduces, described controller 10, by output control signal, regulates pressure-regulating valve 5, the air inflow of head box 7 is reduced,
When in running, described pressure-regulating valve 5 breaks down or controller 10 breaks down, and closes stop valve 3, opens 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 from control valve.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (5)
1. the head box intake air amount control device based on compressed air air blast, it is characterized in that, this system comprises head box (7), air compressor machine, gas buffer tank (4), the gas outlet of described air compressor machine is communicated 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), the first stop valve (1) is provided with 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 respectively arranged with the differential pressure liquid level transmitter (8) for measuring slurry position up and down, the bottom of described head box (7) is provided with the pressure transmitter (7) for measuring stagnation pressure, described pressure-regulating valve (5), pressure transmitter (7), differential pressure liquid level transmitter (8) are all connected with controller (10), and described controller (10) is connected with and rushes liquid pump (11).
2. the head box intake air amount control device based on compressed air air blast according to claim 1, it is characterized in that, this system also comprises the by-passing valve (6) be positioned on assisted ventilation pipeline, 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).
3. the head box intake air amount control device based on compressed air air blast according to claim 1 and 2, is characterized in that: described gas buffer tank (4) is provided with Pressure gauge.
4. 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), differential pressure liquid level transmitter (8) is measured and is fed back the slurry position of head box (7), is sent into by measuring-signal in controller (10); Pressure transmitter (9) is measured and is fed back the stagnation pressure of head box (7), and is sent into by measuring-signal in controller (10); When liquid level raises, described controller (10), by output control signal, regulates pressure-regulating valve (5), the air inflow of head box (7) is increased; When liquid level reduces, described controller (10), by output control signal, regulates pressure-regulating valve (5), the air inflow of head box (7) is reduced.
5. the head box air input control method based on compressed air air blast according to claim 4, it is characterized in that, the method also comprises: 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104746376A true CN104746376A (en) | 2015-07-01 |
| CN104746376B CN104746376B (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| CN (1) | CN104746376B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758470A (en) * | 2017-02-09 | 2017-05-31 | 华南理工大学 | The air cushion pressure adjusting means and adjusting method of a kind 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| 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 |
-
2015
- 2015-04-17 CN CN201510182622.5A patent/CN104746376B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|
| 李中春: "气垫式流浆箱总压头的控制", 《纸和造纸》, no. 06, 30 November 1998 (1998-11-30), pages 24 * |
| 陆平: "气垫式流浆箱控制系统的改造", 《中国造纸》, no. 11, 15 November 2008 (2008-11-15), pages 74 - 75 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758470A (en) * | 2017-02-09 | 2017-05-31 | 华南理工大学 | The air cushion pressure adjusting means and adjusting method of a kind of head box |
| 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 |
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| Publication number | Publication date |
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| CN104746376B (en) | 2016-10-05 |
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