CN113863043A - Water supply method of white water system - Google Patents
Water supply method of white water system Download PDFInfo
- Publication number
- CN113863043A CN113863043A CN202111319152.4A CN202111319152A CN113863043A CN 113863043 A CN113863043 A CN 113863043A CN 202111319152 A CN202111319152 A CN 202111319152A CN 113863043 A CN113863043 A CN 113863043A
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- China
- Prior art keywords
- water
- white water
- white
- machine
- water supply
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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
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
Abstract
The invention relates to a water supply method of a white water system, which comprises an off-machine white water pool and an off-machine white water tower, wherein the off-machine white water tower is provided with a water pump, the water pump is connected with a second water supply branch pipe, and the off-machine white water pool is provided with a liquid level sensor; when L is more than or equal to 95 percent, the water return pipe is opened to transfer the white water to the external white water tower, and when L is less than or equal to 90 percent, the first control valve controls the liquid level of the lower white water tank to be more than 60 percent and less than or equal to 80 percent; the invention has the advantages that: the problem of fluctuation of the liquid level of the machine white water pool is controlled through the liquid level condition in the machine white water pool, water can be timely supplemented to the machine white water pool when the liquid level is insufficient, stable operation of the whole white water system is guaranteed, when the liquid level is sufficient and machine broke paper does not use white water or a pulper does not use white water, redundant white water can be circulated and conveyed to an external white water tower through a water return pipe to be stored, and white water overflow is prevented.
Description
Technical Field
The invention relates to a water supply method of a white water system.
Background
The paper machine white water is collected to a machine white water pool in the production process of a paper making production line, and is conveyed to an external white water tower through a white water pump to be stored; the pulping concentrated conditioning and replenishing water of the production system is taken from an external white water tower and supplied to each concentrated conditioning and replenishing water point through a concentrated conditioning pump; the pulped white water is taken by an external white water tower and is pumped to a pulping system through a pulping pump; the multi-disk white water is taken from the external white water tower and is pumped to a multi-disk water consumption point; the following problems exist in the existing white water system: the white water is pumped to the white water tower by the machine white water tank and then is pumped to each white water use point of the production system, energy waste exists in secondary pumping and transferring of the white water, the white water pump is divided into systems for supplying water, the pump efficiency is low when the water flow rate is low when the consumption of each water replenishing point changes randomly, the white water pump is not controlled by variable frequency constant pressure, and the phenomenon of electric energy waste exists when the pressure of flow rate change is not adjusted in time.
Disclosure of Invention
The invention aims to provide a water supply method of a white water system, which realizes multi-section liquid level control of a machine white water tank and avoids the problem of liquid level fluctuation in the machine white water tank.
In order to solve the technical problems, the invention is realized by the following technical scheme: a water supply method of a white water system comprises a machine white water tank and an external white water tower, wherein a thick white water pump, a multi-disc white water pump and a transfer white water pump are connected to the machine white water tank, the thick white water pump uses the white water in the machine white water tank for thick adjustment and water supplement of the white water system, the multi-disc white water pump conveys the white water in the machine white water tank to a recovery system, the transfer white water pump conveys the white water to a hydrapulper, an under-machine damaged paper pulper and the external white water tower, a first water supply branch pipe is arranged on the transfer white water pump, a water return pipe connected with the external white water tower is arranged on the first water supply branch pipe, a first control valve is arranged on the first water supply branch pipe, a water pump is arranged on the external white water tower, a second water supply branch pipe is connected to the water pump, a second control valve is arranged on the second water supply branch pipe, a pipeline behind the first control valve and a pipeline behind the second control valve are combined to form a water supply main pipe, the water supply method comprises the steps that when the water content is less than 60 percent, the concentrated white water pump, the multi-disc white water pump and the transfer white water pump simultaneously take water from the lower white water pool and supply water; when L is less than or equal to 95 percent, the water return pipe is opened to transfer the white water to the external white water tower, and when L is less than or equal to 90 percent, the water return pipe is closed to stop transferring the white water; the first control valve controls the liquid level of the white water tank to be more than 60 percent and less than or equal to 80 percent; and when L is less than 60%, the water replenishing pipeline replenishes water to the machine bottom water tank.
Preferably, the transfer white water pump and the water pump are both provided with a frequency converter, the first water supply branch pipe and the second water supply branch pipe are both provided with a first pressure sensor, the frequency converter and the first pressure sensor form one-stage constant pressure control, the water supply main pipe is provided with a second pressure sensor, and the second pressure sensor and the second control valve form two-stage constant pressure control.
Preferably, the outlet pressure of the water pump is equal to the outlet pressure of the transfer white water pump.
Preferably, the pressure of the water main is lower than the outlet pressure of the transfer white water pump.
Preferably, when the liquid level of the lower white water pool is lower than a set value and the water supply amount is reduced, the pressure of the water supply main pipe is lower than the set value, the second control valve is automatically opened to enable the second water supply branch pipe to automatically supply water to the water supply main pipe.
Preferably, when the liquid level of the white water tank is higher than the set value, the first control valve is automatically controlled to be opened to increase the pressure of the water main, and the pressure of the water main is increased to automatically close the second control valve to reduce the water supply of the second water supply branch pipe.
Preferably, a water replenishing valve is arranged on the water replenishing pipeline.
Preferably, the water return pipe, the first branch pipe and the second branch pipe are all provided with a third control valve.
In conclusion, the invention has the advantages that: the white water in the machine white water pool is used for the concentrated adjustment water replenishing of a white water system through a concentrated white water pump, the white water in the machine white water pool is conveyed to a recovery system through a multi-disc white water pump, and the white water is conveyed to a hydrapulper, a machine broke pulper and an machine white water tower through a transfer white water pump, so that the whole white water system takes the machine white water pool as a main center for supplying water, and the machine white water tower is a replenishing point for supplying water, in addition, the problem of liquid level fluctuation of the machine white water pool is controlled by detecting the liquid level condition in the machine white water pool in real time through a liquid level sensor, the water replenishing can be timely carried out to the machine white water pool when the liquid level is insufficient, the stable operation of the whole white water system is ensured, and the redundant white water can be circulated and conveyed to the white water tower through a water return pipe to be stored when the liquid level is sufficient and the machine broke paper does not use the white water or the pulper does not use the white water, the white water overflow of the machine white water is prevented, also can be when the liquid level crosses lowly can open the moisturizing pipeline, thereby make the outer white water tower carry out the moisturizing to the water main, effectual prevention machine bottom white water pond is evacuated to find time, guarantee that whole white water system does not need the artificial control just can adjust white water system dynamic water balance, 80% white water in the reducible current white water system is from the repeated transportation of machine bottom white water to outer white water tower, thereby the energy has been practiced thrift, and the production cost is reduced, and the polydisc white water pump is carried the white water in the machine bottom white water pond to the recovery system in, can realize the recycle of white water, the waste of white water has been reduced.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a schematic view of a white water system according to the present invention.
Reference numerals:
the system comprises a machine 1 waste white water pool, a machine 2 waste white water tower, a machine 3 thick white water pump, a machine 4 multi-disc white water pump, a machine 5 transfer white water pump, a hydraulic pulper 6, a machine 7 waste paper pulper, a first water supply branch pipe 8, a water return pipe 9, a first control valve 10, a water pump 11, a second water supply branch pipe 12, a second control valve 13, a water supply main pipe 14, a first branch pipe 15, a second branch pipe 16, a water replenishing pipeline 17, a liquid level sensor 18, a frequency converter 19, a first pressure sensor 20, a second pressure sensor 21, a water replenishing valve 22 and a third control valve 23.
Detailed Description
As shown in fig. 1, a water supply method of a white water system comprises a machine white water pool 1 and an external white water tower 2, wherein the machine white water pool 1 is connected with a thick white water pump 3, a multi-disc white water pump 4 and a transfer white water pump 5, the thick white water pump uses white water in the machine white water pool 1 for thick adjustment water supplement of the white water system, the multi-disc white water pump conveys white water in the machine white water pool 1 to a recovery system, the transfer white water pump 5 conveys the white water to a hydrapulper 6, an under-machine broke pulper 7 and the external white water tower 2, the transfer white water pump 5 is provided with a first water supply branch pipe 8, the first water supply branch pipe 8 is provided with a water return pipe 9 connected with the external white water tower 2, the first water supply branch pipe is provided with a first control valve 10, the external white water tower 2 is provided with a water pump 11, the water pump 11 is connected with a second water supply branch pipe 12, the second water supply branch pipe 12 is provided with a second control valve 13, a pipeline behind the first control valve 10 and a pipeline behind the second control valve 13 are combined to form a water supply main pipe 14, the water outlet end of the water supply main pipe 14 is provided with a first branch pipe 15 for supplying pulped white water to the hydrapulper 6 and a second branch pipe 16 for supplying white water for a paper machine to the under broke pulper 7, the outside white water tower 2 is provided with a water replenishing pipeline 17 connected with the water outlet main pipe, the below white water tank 1 is provided with a liquid level sensor 18 for detecting the liquid level in the below white water tank 1, and the water supply method comprises the steps that when the concentration white water pump 3, the multi-disc white water pump 4 and the transfer white water pump 5 simultaneously take water from the below white water tank 1 and supply the water when the concentration white water pump 3, the multi-disc white water pump 4 and the transfer white water pump 5 are less than 60 percent L; when L is less than or equal to 95 percent, the water return pipe is opened to transfer the white water to the external white water tower 2, and when L is less than or equal to 90 percent, the water return pipe is closed to stop transferring the white water; the first control valve controls the liquid level of the white water tank to be more than 60 percent and less than or equal to 80 percent; when L is less than 60%, the water replenishing pipe 17 replenishes water to the machine white water pool 1.
White water in a machine white water pool 1 is used for concentrated adjustment water supplement of a white water system through a concentrated white water pump, the white water in the machine white water pool 1 is conveyed to a recovery system through a multi-disc white water pump, the white water is conveyed to a hydrapulper, a machine broke pulper and an external white water tower 2 through a transfer white water pump 5, therefore, the whole white water system takes the machine white water pool 1 as a main center for water supply, the external white water tower 2 as a supplement point for water supply, in addition, the problem of liquid level fluctuation of the machine white water pool 1 is controlled through real-time detection of the liquid level condition in the machine white water pool 1 through a liquid level sensor, water can be timely supplemented to the machine white water pool 1 when the liquid level is insufficient, so as to ensure stable operation of the whole white water system, and when the liquid level is sufficient and no white water is used for machine broke paper or no white water is used for pulper circulation, the redundant white water can be conveyed back to the external white water tower 2 through a water return pipe, prevent the plain boiled water overflow, also can open the moisturizing pipeline when the liquid level is too low, thereby make the outer white water tower 2 carry out the moisturizing to the head pipe, effectual prevention machine white water pond 1 is evacuated out of the air, guarantee that whole plain boiled water system does not need the artificial control just can adjust plain boiled water system dynamic water balance, can reduce 80% plain boiled water in the current plain boiled water system and follow the repeated transportation of plain boiled water to outer white water tower 2 in the machine white water pond, thereby the energy has been practiced thrift, and the production cost is reduced, and the polydisc plain boiled water pump carries the plain boiled water in the machine white water pond 1 to the recovery system in, can realize the recycle of plain boiled water, the waste of plain boiled water has been reduced.
The frequency converter 19 is arranged on the transfer white water pump 5 and the water pump 11, the first pressure sensor 20 is arranged on the first water supply branch pipe 8 and the second water supply branch pipe 12, the frequency converter 19 and the first pressure sensor 20 form primary constant pressure control, the second pressure sensor 21 is arranged on the water supply main pipe 14, the second pressure sensor 21 and the second control valve 13 form secondary constant pressure control, the problem that water is only supplied from the under white water pool 1 and the water supply capacity is insufficient when the white water consumption of the production system is in a peak is solved through double water supply loop constant pressure control, the outlet pressure of the water pump is equal to the outlet pressure of the transfer white water pump 5, the frequency conversion constant pressure control can be realized, the stable first level constant pressure water supply pressure is realized, and the purposes of stabilizing the first level constant pressure and reducing the energy consumption are achieved.
The pressure of the water supply main pipe 14 is lower than the outlet pressure of the transfer white water pump 5, when the liquid level of the white water pool 1 is lower than a set value and reduces the water supply amount, the second control valve is automatically opened to enable the second water supply branch pipe to automatically supply water to the water supply main pipe, when the liquid level of the white water pool 1 is higher than the set value, the first control valve is automatically controlled to be opened to enable the pressure of the water supply main pipe to be increased, the pressure of the water supply main pipe is increased, the second control valve is automatically closed to reduce the water supply of the second water supply branch pipe, the water replenishing pipe 17 is provided with a water replenishing valve 22, when the liquid level L is less than 60%, the water replenishing valve can be automatically opened at the first time to replenish water to the white water pool 1, the water returning pipe, the first branch pipe and the second branch pipe are all provided with third control valves 23, and the mutual independent work of the water returning pipe, the first branch pipe and the second branch pipe can be realized, the stability of supplying water to the hydrapulper and the under-machine broke pulper by the white water system is ensured.
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (8)
1. A water supply method of a white water system is characterized in that: the machine white water recovery system comprises a machine white water tank and an external white water tower, wherein a thick white water pump, a multi-disc white water pump and a transfer white water pump are connected to the machine white water tank, the thick white water pump uses white water in the machine white water tank for thick adjustment and water supplement of a white water system, the multi-disc white water pump conveys the white water in the machine white water tank to a recovery system, the transfer white water pump conveys the white water to a hydrapulper, a machine damaged paper pulper and the external white water tower, a first water supply branch pipe is arranged on the transfer white water pump, a water return pipe connected with the external white water tower is arranged on the first water supply branch pipe, a first control valve is arranged on the first water supply branch pipe, the external white water tower is provided with a water pump, a second water supply branch pipe is connected to the water pump, a second control valve is arranged on the second water supply branch pipe, a pipeline behind the first control valve and a pipeline behind the second control valve are combined to form a water supply main pipe, the water supply method comprises the steps that when the water content is less than 60 percent, the concentrated white water pump, the multi-disc white water pump and the transfer white water pump simultaneously take water from the lower white water pool and supply water; when L is less than or equal to 95 percent, the water return pipe is opened to transfer the white water to the external white water tower, and when L is less than or equal to 90 percent, the water return pipe is closed to stop transferring the white water; the first control valve controls the liquid level of the white water tank to be more than 60 percent and less than or equal to 80 percent; and when L is less than 60%, the water replenishing pipeline replenishes water to the machine bottom water tank.
2. A method of supplying water in a white water system according to claim 1, wherein: the water supply system is characterized in that frequency converters are arranged on the transfer white water pump and the water pump, first pressure sensors are arranged on the first water supply branch pipe and the second water supply branch pipe, the frequency converters and the first pressure sensors form one-stage constant pressure control, a second pressure sensor is arranged on the water supply main pipe, and the second pressure sensors and the second control valve form two-stage constant pressure control.
3. A method of supplying water in a white water system according to claim 2, wherein: the outlet pressure of the water pump is equal to the outlet pressure of the transfer white water pump.
4. A method of supplying water in a white water system according to claim 3, wherein: the pressure of the water main is lower than the outlet pressure of the transfer white water pump.
5. A method of supplying water in a white water system according to claim 3, wherein: when the liquid level of the lower white water pool is lower than the set value and the water supply amount is reduced, the pressure of the water supply main pipe is lower than the set value, the second control valve is automatically opened to enable the second water supply branch pipe to automatically supply water to the water supply main pipe.
6. A method of supplying water in a white water system according to claim 3, wherein: when the liquid level of the lower white water tank is higher than a set value, the first control valve is automatically controlled to be opened to enable the pressure of the water supply main pipe to rise, the pressure of the water supply main pipe rises, the second control valve is automatically closed to reduce the water supply of the second water supply branch pipe.
7. A method of supplying water in a white water system according to claim 1, wherein: and a water replenishing valve is arranged on the water replenishing pipeline.
8. A method of supplying water in a white water system according to claim 1, wherein: and the water return pipe, the first branch pipe and the second branch pipe are all provided with third control valves.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111319152.4A CN113863043B (en) | 2021-11-09 | 2021-11-09 | Water supply method of white water system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111319152.4A CN113863043B (en) | 2021-11-09 | 2021-11-09 | Water supply method of white water system |
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| CN113863043A true CN113863043A (en) | 2021-12-31 |
| CN113863043B CN113863043B (en) | 2023-09-19 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05331790A (en) * | 1992-05-26 | 1993-12-14 | Toshiba Corp | Device for controlling level of white water-recovering pit |
| JP2011032615A (en) * | 2009-08-05 | 2011-02-17 | Oriental:Kk | White water supply valve mechanism and method for supplying white water |
| CN102733237A (en) * | 2011-04-08 | 2012-10-17 | 上海东冠纸业有限公司 | In-pulp white water pump pipeline for producing living paper |
| CN204199107U (en) * | 2014-11-11 | 2015-03-11 | 玖龙浆纸（乐山）有限公司 | A kind of paper machine produces plain boiled water and fiber recovery re-use device |
| CN205443776U (en) * | 2016-01-27 | 2016-08-10 | 新乡新亚纸业集团股份有限公司 | Plain boiled water recovery system |
| CN205975780U (en) * | 2016-07-04 | 2017-02-22 | 玖龙纸业（太仓）有限公司 | A vacuum pump circulating water system for papermaking |
| CN110424175A (en) * | 2019-09-04 | 2019-11-08 | 牡丹江恒丰纸业股份有限公司 | A kind of system and method handling paper machine white water and clear water |
| CN213571311U (en) * | 2020-07-07 | 2021-06-29 | 河南护理佳纸业有限公司 | White water recovery device of toilet paper machine |
-
2021
- 2021-11-09 CN CN202111319152.4A patent/CN113863043B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05331790A (en) * | 1992-05-26 | 1993-12-14 | Toshiba Corp | Device for controlling level of white water-recovering pit |
| JP2011032615A (en) * | 2009-08-05 | 2011-02-17 | Oriental:Kk | White water supply valve mechanism and method for supplying white water |
| CN102733237A (en) * | 2011-04-08 | 2012-10-17 | 上海东冠纸业有限公司 | In-pulp white water pump pipeline for producing living paper |
| CN204199107U (en) * | 2014-11-11 | 2015-03-11 | 玖龙浆纸（乐山）有限公司 | A kind of paper machine produces plain boiled water and fiber recovery re-use device |
| CN205443776U (en) * | 2016-01-27 | 2016-08-10 | 新乡新亚纸业集团股份有限公司 | Plain boiled water recovery system |
| CN205975780U (en) * | 2016-07-04 | 2017-02-22 | 玖龙纸业（太仓）有限公司 | A vacuum pump circulating water system for papermaking |
| CN110424175A (en) * | 2019-09-04 | 2019-11-08 | 牡丹江恒丰纸业股份有限公司 | A kind of system and method handling paper machine white water and clear water |
| CN213571311U (en) * | 2020-07-07 | 2021-06-29 | 河南护理佳纸业有限公司 | White water recovery device of toilet paper machine |
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| CN113863043B (en) | 2023-09-19 |
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