CN113863043B - Water supply method of white water system - Google Patents
Water supply method of white water system Download PDFInfo
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- CN113863043B CN113863043B CN202111319152.4A CN202111319152A CN113863043B CN 113863043 B CN113863043 B CN 113863043B CN 202111319152 A CN202111319152 A CN 202111319152A CN 113863043 B CN113863043 B CN 113863043B
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- water
- white
- white water
- water supply
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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
- D21F1/66—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
-
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention relates to a water supply method of a white water system, which comprises an off-board white water tank and an off-board white water tower, wherein the off-board white water tower is provided with a water pump, a second water supply branch pipe is connected to the water pump, a liquid level sensor is arranged on the off-board white water tank, and the water supply method comprises the steps of when 60% < L, simultaneously taking water from the off-board white water tank and supplying water by a concentrated white water pump, a multi-disc white water pump and a transfer white water pump; when the L is less than or equal to 95%, the return pipe is opened to transfer white water to the white water tower outside the machine, and when the L is less than or equal to 90%, the first control valve controls the liquid level of the white water pool below the machine to be more than 60% and less than or equal to 80%; the invention has the advantages that: the problem of fluctuation of the liquid level of the machine water tank is controlled by the liquid level condition in the machine water tank, and water can be timely supplemented to the machine water tank when the liquid level is insufficient so as to ensure the stable operation of the whole white water system, and when the liquid level is sufficient and the machine water is not used by the machine water tank or the pulper, the surplus white water can be returned and transported to the machine water tank for storage through a water return pipe so as to prevent the white water from overflowing.
Description
Technical Field
The invention relates to a water supply method of a white water system.
Background
The existing technological process of the papermaking white water system is that the white water of the paper machine is collected into a white water tank under the machine in the production process of a papermaking production line and is conveyed to a white water tower outside the machine for storage through a white water pump; the production system prepares thick liquid and adjusts the water replenishing to get water to each thick liquid and adjusts the water replenishing point through thick liquid adjusting pump by the white water tower outside the machine; the crushed pulp white water is taken from an off-machine white water tower and pumped to a pulp crushing system through a pulp crushing pump; taking water from a multi-disc white water tower outside the machine and pumping the water to a plurality of water points for use; the following problems exist in existing white water systems: the white water is pumped to a white water tower from a machine water tank and then to each white water using point of a production system, energy waste exists in secondary pumping and transferring of the white water, the white water pump is used for supplying water to a subsystem, the efficiency of the pump is low when the water flow for randomly changing the consumption of each water supplementing point is low, the white water pump is not controlled by variable frequency and constant pressure, and the phenomenon of electric energy waste exists in time regulation of flow change pressure.
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 an under-machine white water tank and avoids the problem of liquid level fluctuation in the under-machine white water tank.
In order to solve the technical problems, the invention is realized by the following technical scheme: the water supply method of the white water system comprises an off-board white water tank and an off-board white water tower, wherein the off-board white water tank is connected with a thick white water pump, a multi-disc white water pump and a transfer white water pump, the thick white water pump is used for supplying water to the white water system by the white water in the off-board white water tank, the multi-disc white water pump is used for conveying the white water in the off-board white water tank to a recovery system, the transfer white water pump is used for conveying the white water to a hydropulper, a paper pulp grinder and the off-board white water tower, a first water supply branch pipe is arranged on the transfer white water pump, a water return pipe connected with the off-board white water tower is arranged on the first water supply branch pipe, a water pump is arranged on the first water supply branch pipe, a second water supply branch pipe is connected with the water pump, a pipeline behind the first control valve is combined with a pipeline behind the second control valve to form a water supply pipeline, a water supply pipe is arranged at the water outlet end of the water supply main, and when the white water level of the water pump is connected with the off-board white water tank, and the white water tank is connected with the off-board white water tank is provided with a water level sensor 60; when the L is less than or equal to 95%, the water return pipe is opened to transfer white water to the white water tower outside the machine, and when the L is less than or equal to 90%, the water return pipe is closed to stop transferring white water; the first control valve controls the liquid level of a white water tank under the machine to be more than 60 percent and less than or equal to 80 percent; when L is less than 60%, the water supplementing pipeline supplements water to the machine water pool.
Preferably, the transfer white water pump and the water pump are both provided with frequency converters, the first water supply branch pipe and the second water supply branch pipe are both provided with first pressure sensors, the frequency converters and the first pressure sensors form primary 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 secondary 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 water supply header is at a pressure lower than the outlet pressure of the transfer white water pump.
Preferably, when the water level of the machine white water pool is lower than a set value and the water supply main pipe pressure 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 water level of the machine water pool 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 be increased, and the pressure of the water supply main pipe is increased to automatically close the second control valve to reduce the water supply of the second water supply branch pipe.
Preferably, the water supplementing pipe is provided with a water supplementing valve.
Preferably, the water return pipe, the first branch pipe and the second branch pipe are all provided with third control valves.
In summary, the invention has the advantages that: the water in the water tank is used for the concentrated water regulation and supplement of the water system through the concentrated water pump, the multi-disc water pump is used for conveying the water in the water tank to the recovery system, and the water pump is used for conveying the water to the hydrapulper, the water tank and the off-board water tower, so that the whole water system takes the water tank as a main water supply core, the off-board water tower is used as a supplement point of water supply, in addition, the water level fluctuation problem of the water tank is controlled by detecting the liquid level condition in the water tank in real time through the liquid level sensor, the water can be timely supplemented to the water tank of the water tank when the liquid level is insufficient, the stable operation of the whole water system is ensured, the redundant water tank can be returned and conveyed to the off-board water tower through the water return pipe when the liquid level is sufficient and the water tank is not used, the overflow of the water tank is prevented, the water supplementing pipeline can be opened when the liquid level is too low, the off-board water tank is effectively prevented from being carried out, the water tank is not required to be fully pumped to the water tank, the water tank is effectively prevented from being pumped to the water tank, the water tank is not is completely pumped to the water tank is effectively, the water tank is not is required to be recovered, the water system is reduced, and the water system is dynamically is reduced, and the water consumption is realized.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 is a schematic diagram of a white water system in accordance with the present invention.
Reference numerals:
the system comprises a white water tank under a machine 1, a white water tower outside the machine 2, a thick white water pump 3, a multi-disc white water pump 4, a transfer white water pump 5, a hydraulic pulper 6, a broke pulper under the machine 7, 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 supplementing pipe 17, a liquid level sensor 18, a frequency converter 19, a first pressure sensor 20, a second pressure sensor 21, a water supplementing 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 white water pond 1 and an off-board white water tower 2, wherein a thick white water pump 3, a multi-disc white water pump 4 and a transfer white water pump 5 are connected to the white water pond 1, the thick white water pump is used for the thick regulation and water supplement of the white water system in the white water pond 1, the multi-disc white water pump is used for conveying the white water in the white water pond 1 to a recovery system, the transfer white water pump 5 is used for conveying the white water to a hydropulper 6, an off-board broke pulper 7 and the white water tower 2, a first water supply branch pipe 8 is arranged on the transfer white water pump 5, a water return pipe 9 connected with the off-board white water tower 2 is arranged on the first water supply branch pipe 8, a water pump 11 is arranged on the off-board white water tower 2, a second water supply branch pipe 12 is connected with the white water pump 11, a second control valve 13 is arranged on the second water supply branch pipe 12, a water pump 10 is connected with a water inlet pipe 14 and a water outlet pipe 14 of the white water pond 1, a water level sensor is arranged on the white water pond 1, a water inlet pipe 17 is arranged on the white water pond 1, a water outlet pipe 17 is connected with the white water pump 1, and a water inlet pipe 17 is connected with the white water pump 1; when the L is less than or equal to 95%, the water return pipe is opened to transfer the white water to the off-machine white water tower 2, and when the L is less than or equal to 90%, the water return pipe is closed to stop transferring the white water; the first control valve controls the liquid level of a white water tank under the machine to be more than 60 percent and less than or equal to 80 percent; when L is less than 60%, the water supplementing pipeline 17 supplements water to the white water pool 1 under the machine.
The water in the water tank 1 is used for the concentrated water supply of the water system by the concentrated white water pump, the white water in the water tank 1 is conveyed to the recovery system by the multi-disc white water pump, and the excessive white water is conveyed to the hydraulic pulper, the water-draining pulper and the water tower 2 outside the water tank by the transfer white water pump 5, so that the whole water system takes the water tank 1 as a main water supply, the water tower 2 outside the water tank is a supplementary point for water supply, in addition, the water level fluctuation problem of the water tank 1 is controlled by detecting the liquid level condition in the water tank 1 in real time by the liquid level sensor, the water supply can be timely carried out to the water tank 1 when the liquid level is insufficient, the stable operation of the whole water system is ensured, the excessive white water can be conveyed to the water tower 2 outside the water tank through the water return pipe when the liquid level is sufficient and the water is not used, the water tank 2 can be prevented from being stored, the water tank 2 can be opened when the water level is low, the water tank 2 outside the water tank is effectively used for the water tank is not required to be repeatedly conveyed to the water tank 1, the water pump 80 can be reduced, the water pump can be effectively controlled, the water pump system is reduced, and the water waste can be reduced, and the water consumption of the water system can be reduced, and the water system can be dynamically and the recycled is reduced.
The water supply system is characterized in that frequency converters 19 are arranged on the transfer white water pump 5 and the water pump 11, first pressure sensors 20 are arranged on the first water supply branch pipe 8 and the second water supply branch pipe 12, the frequency converters 19 and the first pressure sensors 20 form primary constant pressure control, a 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 supply capacity is insufficient when white water of a production system is in peak water supply by simply supplying water from the machine white water tank 1 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, variable-frequency constant-pressure control can be realized, the water pump has stable water supply pressure, and the aims of stabilizing primary constant pressure and reducing energy consumption are achieved.
The pressure of the water supply main 14 is lower than the outlet pressure of the transfer white water pump 5, when the liquid level of the machine white water tank 1 is lower than a set value and the water supply main pressure is lower than the set value when the water supply quantity is reduced, the second control valve is automatically opened to enable the second water supply branch pipe to automatically supply water to the water supply main, when the liquid level of the machine white water tank 1 is higher than the set value, the first control valve is automatically controlled to be opened to enable the water supply main pressure to be increased, the second control valve is automatically closed to reduce the water supply of the second water supply branch pipe, the water supplementing valve 22 is arranged on the water supplementing pipeline 17, when the liquid level L is smaller than 60%, the automatic opening of the water supplementing valve can be controlled at the first time, the water supplementing of the machine white water tank 1 is timely realized, and the third control valves 23 are respectively arranged on the water returning pipe, the first branch pipe and the second branch pipe can work independently, and the water power stability of the water supplying of the pulper and the machine is ensured.
In addition to the above preferred embodiments, the present invention has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the invention, which is defined in the appended claims.
Claims (8)
1. A water supply method for a white water system, characterized by: the method comprises an off-board white water tank and an off-board white water tower, wherein the off-board white water tank is connected with a concentrated white water regulating pump, a multi-disc white water pump and a transfer white water pump, the concentrated white water regulating pump is used for regulating and supplementing white water in the off-board white water tank by using white water in the white water tank to a concentrated white water system, the multi-disc white water pump is used for conveying the white water in the off-board white water tank to a recycling system, the transfer white water pump is used for conveying the white water to a hydropulp, an off-board broke pulper and the off-board white water tower, a first water supply branch pipe is arranged on the transfer white water pump, a water return pipe connected with the off-board white water tower is arranged on the first water supply branch pipe, a water pump is arranged on the off-board white water tower, a second water supply branch pipe is connected with a second water supply branch pipe, a second control valve is arranged on the second water supply branch pipe, a pipeline behind the first control valve and a second control valve is combined to form a water supply main, a water outlet end of the water supply pipeline is provided with a first water supply pulp tank, a water supply pipeline is used for supplying pulp to the hydropulp, and a water level sensor is arranged in the white water tank is used for detecting the off-board, and the white water tank is used for detecting the level of the white water tank when the off-board is lower than a water level from the off-board, and is lower than a water tank is lower than a water level lower than level than a water tank, and is lower than 60; when the L is less than or equal to 95%, the water return pipe is opened to transfer white water to the white water tower outside the machine, and when the L is less than or equal to 90%, the water return pipe is closed to stop transferring white water; the first control valve controls the liquid level of a white water tank under the machine to be more than 60 percent and less than or equal to 80 percent; when L is less than 60%, the water supplementing pipeline supplements water to the machine water pool.
2. The water supply method of the white water system as recited in claim 1, wherein: the automatic water supply device 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 primary constant pressure control, a second pressure sensor is arranged on the water supply main pipe, and the second pressure sensor and the second control valve form secondary constant pressure control.
3. The water supply method of the white water system as recited in claim 2, wherein: the outlet pressure of the water pump is equal to the outlet pressure of the transfer white water pump.
4. A water supply method of a white water system as recited in claim 3, wherein: the water supply header has a pressure that is lower than the outlet pressure of the transfer white water pump.
5. A water supply method of a white water system as recited in claim 3, wherein: when the pressure of the water supply main pipe is lower than a 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 water supply method of a white water system as recited in claim 3, wherein: when the water level of the machine water pool 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 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.
7. The water supply method of the white water system as recited in claim 1, wherein: and a water supplementing valve is arranged on the water supplementing pipeline.
8. The water supply method of the white water system as recited in claim 1, wherein: and the water return pipe, the first branch pipe and the second branch pipe are all provided with third control valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111319152.4A CN113863043B (en) | 2021-11-09 | 2021-11-09 | Water supply method of white water system |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN113863043A CN113863043A (en) | 2021-12-31 |
| CN113863043B true CN113863043B (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111319152.4A Active CN113863043B (en) | 2021-11-09 | 2021-11-09 | Water supply method of white water system |
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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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| CN113863043A (en) | 2021-12-31 |
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