CN110424175B - System and method for treating white water and clean water of paper machine - Google Patents
System and method for treating white water and clean water of paper machine Download PDFInfo
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- CN110424175B CN110424175B CN201910830296.2A CN201910830296A CN110424175B CN 110424175 B CN110424175 B CN 110424175B CN 201910830296 A CN201910830296 A CN 201910830296A CN 110424175 B CN110424175 B CN 110424175B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 539
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000007921 spray Substances 0.000 claims abstract description 96
- 238000005507 spraying Methods 0.000 claims abstract description 55
- 230000005484 gravity Effects 0.000 claims abstract description 49
- 238000004140 cleaning Methods 0.000 claims abstract description 47
- 239000004744 fabric Substances 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims description 29
- 239000013505 freshwater Substances 0.000 claims description 29
- 238000005406 washing Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 20
- 239000000498 cooling water Substances 0.000 claims description 16
- 230000001502 supplementing effect Effects 0.000 claims description 14
- 238000004064 recycling Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 235000011194 food seasoning agent Nutrition 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 7
- 239000000945 filler Substances 0.000 abstract description 7
- 239000002562 thickening agent Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000004537 pulping Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- QHGVXILFMXYDRS-UHFFFAOYSA-N pyraclofos Chemical compound C1=C(OP(=O)(OCC)SCCC)C=NN1C1=CC=C(Cl)C=C1 QHGVXILFMXYDRS-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 241000255969 Pieris brassicae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
-
- 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
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/32—Washing wire-cloths or felts
-
- 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
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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 discloses a system and a method for treating white water and clean water of a paper machine, wherein the system comprises the following components: the system comprises a high-pressure fabric cleaning system, a gravity filter system, a clarified water low-pressure spraying system, a concentrated white water tank, a constant-concentration wet-tissue system, a paper machine white water pipeline and a clear water replenishing pipeline; the clarified water low-pressure spraying system is connected with the gravity filter system, and is connected with a net part spraying water pipeline which is connected with the gravity filter system; the concentrated white water pool is connected with a net part white water pipeline and a press part white water pipeline; the constant-concentration wet broke system is connected with the concentrated white water tank; the high-pressure fabric cleaning system, the net part spray water pipeline, the net part concentrated white water pipeline, the press part white water pipeline and the concentrated white water pool are all connected with the paper machine white water pipeline; the clear water replenishing system is connected with the clarified water low-pressure spraying system and the concentrated white water pool. The invention separates spray water from concentrated white water, so that the spray water can not enter a concentrated white water tank to damage the white water concentration, and is also provided with a constant-concentration wet-loss paper system, and the use of a cylinder thickener is eliminated, thereby further reducing the loss of filler and fine fiber and greatly improving the recovery rate of fine fiber and filler.
Description
Technical Field
The invention relates to the technical field of paper making, in particular to a system and a method for treating white water and clean water of a paper machine.
Background
In the prior art, the technical means for treating the white water and the clean water of the paper machine at least have the following defects:
The spray water and the concentrated white water are collected together, and according to the slurry water balance calculation, the insufficient concentrated white water enters a white water system to cause large white water quantity and smaller concentration;
The consumption of the white water is more than that of the crushed pulp white water and the concentrated water regulating amount, and the excessive white water overflows to cause the loss of fillers and fine fibers;
The white water concentration is small, and the reuse rate of fillers and fine fibers in the crushed pulp white water and the concentrated pulp white water is low;
the spray water can not be recycled, so that the clean water consumption is large;
The rotary screen thickener sprays to increase the clean water consumption and the overflow white water quantity;
the net part and the felt have poor cleaning effect.
Therefore, the current technical means for treating the white water and the clean water of the paper machine are required to be further improved.
Disclosure of Invention
The present invention aims to provide a system and a method for treating white water and clean water of a paper machine, so as to solve the above-mentioned problems in the prior art. In one aspect, the present invention discloses a system for treating white water and fresh water of a paper machine, the system comprising: a high pressure fabric cleaning system 100, a gravity filter system 200, a clarified water low pressure spray system 300, a concentrated white water tank 400, a constant concentration wet broke system 500, a paper machine white water pipeline 600, and a fresh water replenishment system 700; the high-pressure fabric cleaning system 100 is provided with a net part high-pressure cleaning head, a first-pressure cleaning head, a second-pressure cleaning head and a third-pressure cleaning head; the gravity filter system 200 is connected with the high-pressure fabric cleaning system 100, and the gravity filter system 200 is provided with a gravity filter, a recovery pulp tank and a recovery pulp tank pump; the clarified water low-pressure spraying system 300 is connected with the gravity filter system 200, the clarified water low-pressure spraying system 300 is provided with a clarified water tank and a clarified water low-pressure spraying water pump, the clarified water low-pressure spraying system 300 is connected with a net part spraying water pipeline 310, and the net part spraying water pipeline 310 is connected with the gravity filter system 200; the thick white water pool 400 is connected with a net part thick white water pipeline 410 and a press part white water pipeline 420, and the thick white water pool 400 is provided with a pulp crushing white water pump and a thick water regulating pump;
The constant-concentration wet broke system 500 is connected with the concentrated white water tank 400, and the constant-concentration wet broke system 500 is provided with a volt-age tank, a continuous pulp pump and a broken pulp pump; the high-pressure fabric washing system 100, the wire part spray water pipeline 310, the wire part concentrated white water pipeline 410, the press part white water pipeline 420 and the concentrated white water tank 400 are all connected with the paper machine white water pipeline 600;
The clean water replenishment system 700 is connected to the clarified water low pressure spray system 300 and the concentrated white water tank 400.
Optionally, the method further comprises: a seal water pump 610, a clean water pump 620, a low pressure spray water pump 630, and a medium pressure spray water pump 640; the sealing water pump 610, the clean water pump 620, the low-pressure spray water pump 630 and the medium-pressure spray water pump 640 are all connected with the paper machine white water pipeline 600.
Optionally, the water heater further comprises Wen Shuiguan, wherein the sealing water pump 610, the clean water pump 620, the low-pressure spray water pump 630 and the medium-pressure spray water pump 640 are all connected with the warm water tank.
Optionally, a clean water tank 900 is further included, the clean water tank 900 is connected to the warm water tank 800, and the clean water tank 900 is configured with a cooling water pump 910.
Optionally, the size of the clean water tank 900 is 10m, the size of the warm water tank 800 is 50m, and the size of the clean water pump 620 is 3.5bar.
In another aspect, the present invention discloses a method for treating paper machine white water and clean water, the method being applicable to the system for treating paper machine white water and clean water, the method comprising the following four treatment paths
W100, filtration of the washing water: filtering the high-pressure fabric cleaning water generated by the high-pressure fabric cleaning system 100 in the gravity filter system 200, supplementing clear water by the clear water replenishing system 700 after filtering, and entering the clear water low-pressure spraying system 300 for low-pressure spraying of a net part and a squeezing part;
w200, cyclic utilization of spray water: filtering the net part spray water of the net part spray water pipeline 310 by the gravity filter system 200, supplementing clear water by the clear water supplementing system 700 after filtering, entering the clear water low-pressure spray system 300 for low-pressure spraying of the net part and the squeezing part, generating low-pressure spray water, and enabling the low-pressure spray water to enter the net part spray water pipeline 310, enter the gravity filter system 200 again for filtering, and recycling for multiple use;
W300, white water treatment: the wire section white water of the wire section concentrated white water pipeline 410 and the press section white water of the press section white water pipeline 420 enter the concentrated white water pool 400 for treatment, and after the clean water replenishing system 700 supplements water, concentrated white water can be directly used for pulping and concentrated seasoning by using a pulping white water pump and a concentrated seasoning pump;
W400, wet broke treatment: the concentrated white water of the concentrated white water tank 400 is input into the constant concentration wet broke system 500 by means of a pulp crushing white water pump, and the wire section wet broke and the press section wet broke are processed into the constant concentration wet broke system 500, the wet broke being processed into a pulp system.
Alternatively, the wire section white water, the press section white water, the cleaning water of the high pressure fabric cleaning system 100, and the shower water of the wire section shower water pipe 310 are supplied from the paper machine white water pipe 600.
Optionally, the sealing water pump 610 provides sealing water, the clean water pump 620 provides auxiliary preparation water and make-up clean water, and the low pressure spray water pump 630 and the medium pressure spray water pump 640 provide spray water.
Optionally, the clean water tank 900 is provided with a cooling water pump 910, and the cooling water of the cooling water pump 910 returns to the warm water tank 800.
Optionally, the concentration of the broke in the broke pond is adjusted using the continuous pulp pump and the broken pulp pump.
The system and the method for treating the white water and the clean water of the paper machine have the following beneficial effects:
1. According to the system and method for treating white water and clear water of a paper machine of the present invention, since the present invention creatively collects and processes shower water separately from concentrated white water, it is uniquely designed such that shower water does not enter the concentrated white water tank 500 to destroy white water concentration, and is further equipped with the constant concentration wet broke system 400, so that white water concentration can be accurately controlled.
2. According to the system and the method for treating the white water and the clean water of the paper machine, the spraying water at the net part of the paper machine is recycled, so that the consumption of the clean water is reduced.
3. According to the system and the method for treating the white water and the clean water of the paper machine, the overflow of the white water is reduced, the recovery rate of fine fibers and fillers is improved, and the ton paper consumption of the clean water is reduced.
4. According to the system and the method for treating the white water and the clear water of the paper machine, the cooling water backwater is used for supplementing water for spraying water of the paper machine, preparing auxiliary agents, sealing water of equipment and the like, so that the consumption of the clear water is reduced.
5. According to the system and the method for treating the white water and the clean water of the paper machine, the cylinder thickener is canceled, and the ton paper consumption of the clean water is reduced.
6. According to the system and the method for treating the white water and the clean water of the paper machine, the high-pressure fabric cleaning system is used, so that the cleanliness of valuables is improved, the service life of the valuables is prolonged, and the consumption of the clean water and electricity is reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
Fig. 1 is a schematic diagram of a system for treating paper machine white water and fresh water in accordance with one embodiment of the present invention;
Fig. 2 is a schematic diagram of a system for treating white water and fresh water of a paper machine in accordance with another embodiment of the present invention;
fig. 3 is a process flow diagram of a method of treating paper machine white water and fresh water in accordance with one embodiment of the present invention.
Fig. 4 is a schematic process flow diagram of a wet broke treatment process for a paper machine in a white water and clean water treatment process for a paper machine in accordance with one embodiment of the invention.
The attached drawings are identified: 100-high-pressure fabric cleaning system, 200-gravity filter system, 300-clarified water low-pressure spray system, 310-net part spray water pipeline, 400-concentrated white water tank, 410-net part concentrated white water pipeline, 420-press part white water pipeline, 500-constant concentration wet-broke system, 600-paper machine white water pipeline, 610-sealing water pump, 620-clean water pump, 630-low-pressure spray water pump, 640-medium-pressure spray water pump, 700-clean water supplementing system, 800-hot water tank, 900-clean water tank and 910-cooling water pump.
Detailed Description
The application will now be described in further detail with reference to the accompanying drawings by way of specific examples. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. In addition, the examples are illustrative only and are not to be construed as limiting the application.
In one aspect, the present invention discloses a system for treating white water and fresh water of a paper machine.
Structural analysis of the invention according to an embodiment of the invention, as shown in fig. 1, the system comprises: a high pressure fabric cleaning system 100, a gravity filter system 200, a clarified water low pressure spray system 300, a concentrated white water tank 400, a constant concentration wet broke system 500, a paper machine white water pipeline 600, and a fresh water replenishment system 700; the high-pressure fabric cleaning system 100 is provided with a net part high-pressure cleaning head, a first-pressure cleaning head, a second-pressure cleaning head and a third-pressure cleaning head; the gravity filter system 200 is connected with the high-pressure fabric cleaning system 100, and the gravity filter system 200 is provided with a gravity filter, a recovery pulp tank and a recovery pulp tank pump; the clarified water low-pressure spraying system 300 is connected with the gravity filter system 200, the clarified water low-pressure spraying system 300 is provided with a clarified water tank and a clarified water low-pressure spraying water pump, the clarified water low-pressure spraying system 300 is connected with a net part spraying water pipeline 310, and the net part spraying water pipeline 310 is connected with the gravity filter system 200; the thick white water pool 400 is connected with a net part thick white water pipeline 410 and a press part white water pipeline 420, and the thick white water pool 400 is provided with a pulp crushing white water pump and a thick water regulating pump; the constant-concentration wet broke system 500 is connected with the concentrated white water tank 400, and the constant-concentration wet broke system 500 is provided with a volt-age tank, a continuous pulp pump and a broken pulp pump; the high-pressure fabric washing system 100, the wire part spray water pipeline 310, the wire part concentrated white water pipeline 410, the press part white water pipeline 420 and the concentrated white water tank 400 are all connected with the paper machine white water pipeline 600; the clean water replenishment system 700 is connected to the clarified water low pressure spray system 300 and the concentrated white water tank 400.
The working process and the technical principle of the invention are as follows: according to an embodiment of the present invention, as shown in fig. 3, the system for treating paper machine white water and clean water according to the present invention is used to treat paper machine white water and clean water by the following four treatment methods.
W100, filtration of the washing water: in operation, the high-pressure fabric washing water generated by the high-pressure fabric washing system 100 enters the gravity filter system 200 for filtration, and the filtered clean water replenishment system 700 supplements clean water and enters the clarified water low-pressure spraying system 300 for low-pressure spraying of the net part and the press part.
According to an embodiment of the present invention, as shown in fig. 1, the fabric may be washed using a wire section high pressure washing head, a first pressure washing head, a second pressure washing head, and a third pressure washing head of the high pressure fabric washing system 100, to obtain high pressure fabric washing water after washing; then, the high-pressure fabric cleaning water is filtered by a gravity filter of the gravity filter system 200, and the filtered clean water replenishing system 700 is supplemented with a proper amount of clean water and enters the clarified water low-pressure spraying system 300; then, the clarified water tank of the clarified water low-pressure spray system 300 may be further purified, the net section and the press section may be sprayed at a low pressure by the clarified water low-pressure spray pump, and the surplus slurry may be recovered by the recovery slurry tank and the recovery slurry tank pump.
W200, cyclic utilization of spray water: in operation, the net spray water of the net spray water pipeline 310 enters the gravity filter system 200 for filtration, the clear water replenishment system 700 supplements clear water after filtration, enters the clear water low-pressure spray system 300 for low-pressure spraying of the net and the squeezing part, and low-pressure spray water is generated, enters the net spray water pipeline 310, enters the gravity filter system 200 again for filtration, and is recycled for multiple uses.
According to an embodiment of the present invention, as shown in fig. 1, the net spray water of the net spray water pipe 310 enters the gravity filter system 200, the gravity filter of the gravity filter system 200 is used to filter and purify the net spray water, and the filtered clean water replenishment system 700 supplements a proper amount of clean water and enters the clarified water low-pressure spraying system 300; then, the clarifying water tank of the clarifying water low-pressure spraying system 300 can be used for further clarifying and purifying, and the clarifying water low-pressure spraying water pump can be used for carrying out low-pressure spraying on the net part and the pressing part to generate low-pressure spraying water; then, the low-pressure spray water enters the net part spray water pipeline 310, and enters the gravity filter system 200 again for filtering and the clarified water low-pressure spray system 300 for clarifying respectively, and the net part and the squeezing part can be sprayed at low pressure again, so that the water is recycled continuously and reused.
W300, white water treatment: in operation, the press section white water of the press section white water pipeline 420 and the wire section white water of the wire section thick white water pipeline 410 are fed into the thick white water pool 400 for treatment, and after the clean water replenishing system 700 is properly replenished with water, thick white water can be directly used for pulping and thick seasoning by using the pulping white water pump and the thick seasoning pump.
W400, wet broke treatment: in operation, after proper replenishment of the fresh water make-up system 700, the concentrated white water from the concentrated white water tank 400 is fed to the constant concentration wet broke system 500 using a pulp crushing white water pump, and the wire section wet broke and press section wet broke are fed to the constant concentration wet broke system 500 for treatment.
According to an embodiment of the present invention, as shown in fig. 1, the constant-concentration wet broke system 400 is provided with a broke pond, a continuous pulp pump and a broken pulp pump, and the concentration of the broke in the broke pond can be accurately adjusted by using the continuous pulp pump and the broken pulp pump.
Because the invention creatively collects and processes the spray water and the concentrated white water separately, the unique design ensures that the spray water does not enter the concentrated white water tank 400 to damage the white water concentration, and is also provided with the constant-concentration wet broke system 500, the use of a cylinder mould thickener is canceled, the loss of fillers and fine fibers is further reduced, and the recovery rate of the fine fibers and the fillers is greatly improved.
According to the embodiment of the invention, the technical scheme of the system for treating the white water and the clean water of the paper machine can be further improved on the basis of the above, and the following steps are further performed:
1. According to an embodiment of the present invention, as shown in fig. 2, further comprising: a seal water pump 610, a clean water pump 620, a low pressure spray water pump 630, and a medium pressure spray water pump 640; the sealing water pump 610, the clean water pump 620, the low-pressure spray water pump 630 and the medium-pressure spray water pump 640 are all connected with the paper machine white water pipeline 600.
2. According to an embodiment of the present invention, as shown in fig. 2, the water treatment device further comprises Wen Shuiguan 800,800, wherein the sealing water pump 610, the clean water pump 620, the low-pressure spray water pump 630 and the medium-pressure spray water pump 640 are all connected with the warm water tank.
3. According to an embodiment of the present invention, as shown in fig. 2, a clean water tank 900 is further included, the clean water tank 900 is connected to the warm water tank 800, and the clean water tank 900 is provided with a cooling water pump 910.
4. According to an embodiment of the present invention, as shown in fig. 2, the clean water tank 900 has a specification of 10m, the warm water tank 800 has a specification of 50m, and the clean water pump 620 has a specification of 3.5bar.
In another aspect, the present invention discloses a method of treating paper machine white water and fresh water, which is applicable to the system for treating paper machine white water and fresh water described above. According to an embodiment of the invention, as shown in fig. 3, the method includes four processing paths: w100, filtration of the washing water: filtering the high-pressure fabric cleaning water generated by the high-pressure fabric cleaning system 100 in the gravity filter system 200, supplementing clear water by the clear water replenishing system 700 after filtering, and entering the clear water low-pressure spraying system 300 for low-pressure spraying of a net part and a squeezing part; w200, cyclic utilization of spray water: filtering the net part spray water of the net part spray water pipeline 310 by the gravity filter system 200, supplementing clear water by the clear water supplementing system 700 after filtering, entering the clear water low-pressure spray system 300 for low-pressure spraying of the net part and the squeezing part, generating low-pressure spray water, and enabling the low-pressure spray water to enter the net part spray water pipeline 310, enter the gravity filter system 200 again for filtering, and recycling for multiple use; w300, white water treatment: press section white water of the wire section concentrated white water pipe 410 and the press section white water pipe 420 is processed in the constant concentration wet broke system 400, and then is processed in the concentrated white water tank 500. W400, wet broke treatment: the concentrated white water of the concentrated white water tank 400 is input into the constant concentration wet broke system 500 by means of a pulp crushing white water pump, and the wire section wet broke and the press section wet broke are processed into the constant concentration wet broke system 500, the wet broke being processed into a pulp system.
The above parts have been described and will be described in further detail in the following parts, and thus the description thereof will not be repeated.
According to the embodiment of the invention, the technical scheme of the system for treating the white water and the clean water of the paper machine can be further improved on the basis of the above, and the following steps are further performed:
1. According to an embodiment of the present invention, as shown in fig. 1, the wire section concentrated white water, the press section white water, the cleaning water of the high pressure fabric cleaning system 100, and the shower water of the wire section shower water pipe 310 are supplied from the paper machine white water pipe 600.
2. According to an embodiment of the present invention, as shown in fig. 2, the sealing water pump 610 provides sealing water, the clean water pump 620 provides auxiliary preparation water and make-up clean water, and the low pressure spray water pump 630 and the medium pressure spray water pump 640 provide spray water.
3. According to an embodiment of the present invention, as shown in fig. 2, the fresh water tank 900 is provided with a cooling water pump 910, and the cooling water of the cooling water pump 910 returns to the warm water tank 800.
4. According to an embodiment of the invention, the concentration of the volt-age Chi Bai water is adjusted using the continuous pulp pump and the broken pulp pump. The person skilled in the relevant art will appreciate that the features and effects described above in relation to the system for treating white water and fresh water of a paper machine, of course, are also applicable to the method and will not be repeated.
The invention will now be further illustrated by the following specific examples, which are given for illustrative purposes only and are not to be construed as limiting the invention in any way, in conjunction with the accompanying figures 1-4. In addition, in the following examples, the equipment and materials used are commercially available unless otherwise specified.
Example 1: filtration of the washing water
(1) White water and clean water sources of paper machine: the special paper production factory has 78 g/square meter, the speed of the special paper production factory is 400m/min, and the daily yield is 100 tons/day.
(2) The main equipment comprises: high pressure cleaning system: the method comprises the steps of arranging a water purifying device, a high-pressure pump station, a high-pressure cleaning head with a net part, a first-pressure cleaning head, a second-pressure cleaning head and a third-pressure cleaning head; gravity filter system: a gravity filter, a recycling pulp pool and a recycling pulp pool pump are arranged; the clarified water low-pressure spraying system comprises: is provided with a clarifying water tank and a clarifying water low-pressure spray water pump.
(3) The operation steps are as follows: a. the high-pressure fabric washing water can be obtained after washing the fabric by using the net part high-pressure washing head, the first-pressure washing head, the second-pressure washing head and the third-pressure washing head of the high-pressure fabric washing system 100; b. filtering the high-pressure fabric cleaning water by using a gravity filter of the gravity filter system 200, supplementing a proper amount of clean water by the clean water replenishing system 700 after filtering, and entering the clarified water low-pressure spraying system 300; c. the clarified water tank of the clarified water low-pressure spraying system 300 can be used for further purification, the clarified water low-pressure spraying water pump can be used for low-pressure spraying of the net part and the press part, and the recovery slurry tank pump can be used for recovering residual slurry.
Example 2: cyclic utilization of spray water
(1) White water and clean water sources of paper machine: the special paper production factory has 78 g/square meter, the speed of the special paper production factory is 400m/min, and the daily yield is 100 tons/day.
(2) The main equipment comprises: gravity filter system: a gravity filter, a recycling pulp pool and a recycling pulp pool pump are arranged; the clarified water low-pressure spraying system comprises: is provided with a clarifying water tank and a clarifying water low-pressure spray water pump.
(3) The operation steps are as follows: a. the net part spray water of the net part spray water pipeline 310 enters the gravity filter system 200, the net part spray water is filtered and purified by utilizing the gravity filter of the gravity filter system 200, and a proper amount of clear water is supplemented by the clear water supplementing system 700 after filtration and enters the clarified water low-pressure spray system 300; b. the clarified water tank of the clarified water low-pressure spraying system 300 can be used for further clarification and purification, and the clarified water low-pressure spraying water pump can be used for carrying out low-pressure spraying on the net part and the pressing part to generate low-pressure spraying water; c. the low-pressure spray water enters the net part spray water pipeline 310, enters the gravity filter system 200 again for filtering, and enters the clarified water low-pressure spray system 300 for clarifying, so that the net part and the squeezing part can be sprayed again at low pressure, and the water is recycled continuously and reused.
Example 3: treatment of white water
(1) White water and clean water sources of paper machine: the special paper production factory has 78 g/square meter, the speed of the special paper production factory is 400m/min, and the daily yield is 100 tons/day.
(2) The main equipment comprises: concentrated white water pool: and (5) preparing a crushed pulp white water pump and a concentrated water regulating pump.
(3) The operation steps are as follows: a. entering the press section white water of the wire section concentrated white water pipe 410 and the press section white water pipe 420 into a concentrated white water tank; b. after the clean water replenishing system 700 is properly replenished with water, the concentrated white water can be directly used for pulp crushing and concentrated mixing by utilizing the pulp crushing white water pump and the concentrated mixing pump.
Example 4: treatment of wet broke
(1) White water and clean water sources of paper machine:
the special paper production factory has 78 g/square meter, the speed of the special paper production factory is 400m/min, and the daily yield is 100 tons/day.
(2) The main equipment comprises: and (5) a loss pool: a continuous pulp pump and a broken pulp pump are configured.
(3) The operation steps are as follows: a, feeding wet broke of the wire part and wet broke of the press part into a loss-in-press tank; b. after the clean water replenishment system 700 is properly replenished with water, the concentrated white water of the concentrated white water tank 400 is input into the constant concentration wet broke system 500 by using a pulp crushing white water pump; c. the concentration of the damaged paper in the damaged pond is regulated by using the continuous pulp pump and the broken pulp pump, so that wet damaged paper with constant concentration can be directly fed into a pulp system.
Example 5: white water supply for paper machine
(1) White water and clean water sources of paper machine:
the special paper production factory has 78 g/square meter, the speed of the special paper production factory is 400m/min, and the daily yield is 100 tons/day.
(2) The main equipment comprises: clean water tank: 10m, configuring a cooling water pump;
wen Shuiguan: 50m cm long, configuring a sealing water pump;
pump body: 3.5bar clean water pump, low pressure spray water pump, medium pressure spray water pump.
(3) The operation steps are as follows: a. the clean water tank 900 returns cooling backwater to the warm water tank 800 through the cooling water pump 910; b. the hot water tank 800 can be connected with an external net clear water pipeline; c. wen Shuiguan 800, supplying sealing water through the sealing water pump 610, wen Shuiguan, supplying auxiliary agent preparation water and supplementary clean water through the clean water pump 620, and Wen Shuiguan, supplying spray water through the low-pressure spray water pump 630 and the medium-pressure spray water pump 640; d. sealing water, water for preparing auxiliary agent, replenishing clear water and spraying water all enter the white water pipeline 600 of the paper machine and are supplied to the white water of the paper machine.
Experimental results: following the procedure of examples 1-5, the specific experimental results are as follows: water amount evaporated per ton of paper drying: 2m w/ton, 200 tons per day, 50 tons per day of clean water for high pressure fabric cleaning, 200 tons per day of equipment sealing water, 300 tons per day of auxiliary agent, and 300 tons per part of supplemental clean water. Total consumption totaled 1050 tons/day. Conclusion: the paper water consumption per ton is 10m, whereas in the prior art, the paper water consumption per ton is 30-50 m.
The foregoing description of the preferred embodiment of the invention is merely illustrative of the invention, and is not intended to be limiting, since various modifications and variations of the invention are possible. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A system for treating white water and fresh water in a paper machine, the system comprising: a high-pressure fabric cleaning system (100), a gravity filter system (200), a clarified water low-pressure spraying system (300), a concentrated white water tank (400), a constant-concentration wet-broke system (500), a paper machine white water pipeline (600) and a clear water replenishing system (700);
The high-pressure fabric cleaning system (100) is provided with a net part high-pressure cleaning head, a first-pressure cleaning head, a second-pressure cleaning head and a third-pressure cleaning head;
The gravity filter system (200) is connected with the high-pressure fabric cleaning system (100), and the gravity filter system (200) is provided with a gravity filter, a recovery pulp tank and a recovery pulp tank pump;
The clarified water low-pressure spraying system (300) is connected with the gravity filter system (200), the clarified water low-pressure spraying system (300) is provided with a clarified water tank and a clarified water low-pressure spraying water pump, the clarified water low-pressure spraying system (300) is connected with a net part spraying water pipeline (310), and the net part spraying water pipeline (310) is connected with the gravity filter system (200);
The thick white water tank (400) is connected with a net part thick white water pipeline (410) and a press part white water pipeline (420), and the thick white water tank (400) is provided with a pulp crushing white water pump and a thick water regulating pump;
The constant-concentration wet broke system (500) is connected with the concentrated white water tank (400), and the constant-concentration wet broke system (500) is provided with a loss pool, a continuous pulp pump and a broken pulp pump;
The high-pressure fabric cleaning system (100), the net part spray water pipeline (310), the net part concentrated white water pipeline (410), the press part white water pipeline (420) and the concentrated white water tank (400) are all connected with the paper machine white water pipeline (600);
the clear water replenishing system (700) is connected with the clarified water low-pressure spraying system (300) and the concentrated white water tank (400).
2. The system for treating white water and clear water of a paper machine as set forth in claim 1, further comprising: a sealing water pump (610), a clean water pump (620), a low-pressure spray water pump (630) and a medium-pressure spray water pump (640);
The sealing water pump (610), the clean water pump (620), the low-pressure spray water pump (630) and the medium-pressure spray water pump (640) are all connected with the paper machine white water pipeline (600).
3. The system for treating white water and clear water of a paper machine according to claim 2, further comprising Wen Shuiguan (800), wherein the sealing water pump (610), the clear water pump (620), the low-pressure spray water pump (630) and the medium-pressure spray water pump (640) are all connected to the warm water tank.
4. The system for treating paper machine white water and fresh water according to claim 3, further comprising a fresh water tank (900), wherein the fresh water tank (900) is connected to the warm water tank (800), and wherein the fresh water tank (900) is provided with a cooling water pump (910).
5. The system for treating paper machine white water and fresh water according to claim 4, wherein the fresh water tank (900) has a gauge of 10m, the warm water tank (800) has a gauge of 50m, and the fresh water pump (620) has a gauge of 3.5bar.
6. A method of treating paper machine white water and fresh water, the method being applicable to the system of treating paper machine white water and fresh water according to any one of claims 1 to 5, characterized in that the method comprises the following four treatment paths: w100, filtration of the washing water: filtering high-pressure fabric cleaning water generated by the high-pressure fabric cleaning system (100) in the gravity filter system (200), supplementing clear water by the clear water supplementing system (700) after filtering, and entering the clear water low-pressure spraying system (300) for low-pressure spraying of a net part and a squeezing part;
W200, cyclic utilization of spray water: filtering the net part spray water of the net part spray water pipeline (310) by the gravity filter system (200), supplementing clear water by the clear water supplementing system (700) after filtering, and feeding the clear water into the clear water low-pressure spray system (300) for low-pressure spraying of the net part and the squeezing part to generate low-pressure spray water, wherein the low-pressure spray water enters the net part spray water pipeline (310) and then enters the gravity filter system (200) again for filtering, recycling and reusing;
W300, white water treatment: the method comprises the steps that after the net part white water of the net part concentrated white water pipeline (410) and the press part white water of the press part white water pipeline (420) enter the concentrated white water pool (400) for treatment, the clear water replenishing system (700) is used for replenishing water, and the concentrated white water can be directly used for pulp breaking and concentrated seasoning by utilizing a pulp breaking white water pump and a concentrated seasoning pump;
w400, wet broke treatment: the thick white water in the thick white water tank (400) is input into the constant-concentration wet broke system (500) by using a thick white water pump, and the wet broke in the wire part and the wet broke in the pressing part are processed by the constant-concentration wet broke system (500), and the wet broke enters the slurry system.
7. The method of treating paper machine white water and fresh water according to claim 6, wherein the wire section white water, the press section white water, the cleaning water of the high pressure fabric cleaning system (100) and the shower water of the wire section shower water pipe (310) are supplied by the paper machine white water pipe (600).
8. The method of treating paper machine white water and fresh water according to claim 7, wherein the sealing water pump (610) provides sealing water, the fresh water pump (620) provides auxiliary agent preparation water and make-up fresh water, and the low pressure spray water pump (630) and the medium pressure spray water pump (640) provide spray water.
9. The method of treating paper machine white water and fresh water according to claim 8, characterized in that the fresh water tank (900) is provided with a cooling water pump (910), and that the cooling water of the cooling water pump (910) is returned to the warm water tank (800).
10. The method of treating machine white water and fresh water according to claim 6, wherein the consistency of the broke in the broke pit is adjusted by means of the continuous pulp pump and the broke pump.
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