CN109610215B - Waste water recovery device of paper-making disintegrating section and utilization method - Google Patents
Waste water recovery device of paper-making disintegrating section and utilization method Download PDFInfo
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- CN109610215B CN109610215B CN201811575127.0A CN201811575127A CN109610215B CN 109610215 B CN109610215 B CN 109610215B CN 201811575127 A CN201811575127 A CN 201811575127A CN 109610215 B CN109610215 B CN 109610215B
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- outlet pipe
- liquid level
- regulating valve
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- 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
- D21B1/32—Defibrating by other means of waste paper
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a waste water recovery device of a paper-making disintegrating section and a utilization method. The waste water recovery device comprises: a wastewater tank, a pump, an outlet pipe and a flow transmitter; the inlet of the waste water tank is connected with a waste water discharge pipeline, and the outlet of the waste water tank is connected with the outlet pipe through the pump; the outlet pipe is connected to the pulping zone; and a flow transmitter is arranged on the outlet pipe and at the downstream of the pump and is used for measuring the water flow of the outlet pipe. The invention collects the residual waste water in deslagging of the disintegrating section and transfers the waste water to the disintegrating area through the waste water recycling device, and the waste water is recycled in the disintegrating area.
Description
Technical Field
The embodiment of the invention relates to a papermaking technology, in particular to a waste water recovery device of a papermaking disintegrating section and a utilization method.
Background
The waste residue that the paper mill need produce the fragmentation section is collected, can extrude the waste residue in the collection process, and the white water that extrudees the outflow just becomes waste water and discharges into the trench, just can discharge after waste water treatment. FIG. 1 is a schematic view of a prior art de-scum apparatus for a paper making disintegration section. As shown in fig. 1, the high concentration slag remover is used for discharging heavy slag, the heavy slag is extracted and collected through the spiral slag extractor, but redundant white water overflows to a trench, and if the high concentration slag remover fails to meet the slag discharging valve, a large amount of slurry is lost; the light slag from the disintegrating section is generally extruded and dehydrated by a slag extruding machine, the light slag is collected, the extruded water is directly discharged into a trench, and other waste materials can be carried in the light slag. Therefore, the paper-making disintegrating stage always discharges waste water, waste water treatment costs a certain amount, and even if the waste water is treated, the waste water is a burden to the environment.
Disclosure of Invention
The invention aims to provide a waste water recovery device of a papermaking disintegrating section, which is used for realizing waste water recovery of the disintegrating section;
the invention also aims to provide a method for recycling the waste water of the paper-making disintegrating section, so as to recycle the waste water recycled by the disintegrating section into the disintegrating process.
In a first aspect, the present invention provides a waste water recovery apparatus for a paper-making disintegrating section, comprising: a wastewater tank, pump and outlet pipe;
the inlet of the waste water tank is connected with a waste water discharge pipeline, and the outlet of the waste water tank is connected with the outlet pipe through the pump;
the outlet pipe is connected to the pulping zone.
And the outlet pipe is also provided with a flow transmitter at the downstream of the pump and used for measuring the water flow of the outlet pipe.
Wherein a return pipe is provided on the outlet pipe between the pump and the flow transmitter, the return pipe being connected to the sump; the return pipe is provided with a return pipe regulating valve.
Wherein, an outlet pipe regulating valve is arranged on the outlet pipe.
Further, the wastewater recovery device further comprises: the controller and a liquid level sensor are arranged in the wastewater tank;
the controller is in signal connection with the liquid level sensor and is used for controlling the outlet pipe regulating valve and the return pipe regulating valve according to the liquid level height of the wastewater tank acquired by the liquid level sensor.
Furthermore, an isolation groove is arranged between the waste water discharge pipeline and a water outlet of the slag squeezing machine;
and a screen is arranged in the isolation groove.
In a second aspect, the present invention also provides a method for recycling waste water from a paper-making disintegrating stage, comprising:
calculating the recovered water amount according to the water flow of the outlet pipe acquired by the flow transmitter;
obtaining the weight of waste paper;
calculating the water demand for fragmentation: waste paper weight (100% -waste paper moisture) (100% -impurity content) + water demand for disintegration + concentration of disintegrated water + concentration of recovered water = concentration of required disintegration (water demand for disintegration + weight of waste paper + water content of waste paper + amount of recovered water);
wherein, the water content, impurity content, concentration of the crushed water and concentration of the waste water are preset parameters.
Further, the method for recycling the wastewater further comprises the following steps:
setting the required liquid level of the wastewater tank;
acquiring the actual liquid level of the wastewater tank through a liquid level sensor;
and comparing the actual liquid level with the required liquid level, and adjusting the opening degrees of the return pipe regulating valve and the outlet pipe regulating valve according to the comparison result.
Wherein, contrast actual liquid level and required liquid level to adjust the aperture of back flow control valve and outlet pipe governing valve according to the contrast result, include:
if the actual liquid level is larger than the required liquid level, the opening degree of the outlet pipe regulating valve is increased, and the opening degree of the return pipe regulating valve is reduced;
if the actual liquid level is less than or equal to the required liquid level, the opening degree of the outlet pipe regulating valve is reduced, and the opening degree of the return pipe regulating valve is increased.
The opening of the outlet pipe regulating valve =100% -the opening of the return pipe regulating valve.
The invention collects the residual waste water in deslagging of the disintegrating section and transfers the waste water to the disintegrating area through the waste water recycling device, and the waste water is recycled in the disintegrating area.
Drawings
FIG. 1 is a schematic view of a deslagging apparatus of a prior art paper making disintegration section;
FIG. 2 is a schematic view of a wastewater reclamation apparatus according to a first embodiment of the present invention;
FIG. 3 is a flow chart of a method for recycling wastewater according to a second embodiment of the present invention;
FIG. 4 is a flow chart of a wastewater tank liquid level control method in the second embodiment of the present invention;
in the figure:
1. a wastewater tank; 2. a pump; 3. an outlet pipe; 4. an outlet pipe regulating valve; 5. a flow transmitter; 6. a return pipe; 7. a return pipe regulating valve; 8. an isolation trench; 801. and (4) screening.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 2 is a schematic diagram of a waste water recycling apparatus in an embodiment of the present invention, which is applicable to a disintegrating section of a paper making process, and recycles white water left after disintegrating waste residues are extracted.
This waste water recovery device includes: a waste tank 1, a pump 2 and an outlet pipe 3.
The inlet of the wastewater tank 1 is connected with a wastewater discharge pipeline, and the outlet is connected with the outlet pipe 3 through the pump 2. The waste water discharge pipeline is connected with a waste water overflow port of the spiral slag extractor in the prior art and a water discharge port of the slag squeezing machine.
An isolation groove 8 is also arranged between the waste water discharge pipeline and the water outlet of the slag squeezing machine. The isolation tank 8 is used for screening foreign particles such as plastic sheets and the like in the wastewater discharged from the slag squeezing machine. The height of the groove wall of one side of the isolation groove 8 is smaller than that of the opposite groove wall, so that workers can conveniently remove accumulated impurities from the isolation groove 8. The screen mesh 801 is arranged in the isolation groove, the aperture of the screen mesh 801 is 1.5-3 mm, the screen mesh with the aperture of 2mm is generally selected, the screen mesh is arranged at an inclination angle of 45 degrees, and one side of the groove wall close to the isolation groove 8 with the smaller height is lower.
Said outlet pipe 3 is connected to the pulping zone. In this embodiment, a drum pulper is used for the disintegration, and the water outlet pipe 3 is connected to the feed inlet of the drum pulper.
And a flow transmitter 5 is also arranged on the outlet pipe 3 and at the downstream of the pump 2 and is used for measuring the water flow of the outlet pipe 3. The drum pulper is required to carry out pulping under the condition that the concentration of the waste paper raw material is 14% -22%, a feeding hopper of a pulping area is provided with a water inlet, and the pulper calculates the water inflow of the water inlet according to the water flow of the waste water flowing into the feeding hole so as to keep the concentration of the raw material in the drum within a specified range.
Further, an outlet pipe regulating valve 4 is arranged on the outlet pipe 3 and used for regulating the water flow of the outlet pipe 3. A return pipe 6 is arranged on the outlet pipe 3 between the pump 2 and the flow transmitter 5, and the return pipe 6 is connected to the wastewater tank 1 as a branch pipeline of the outlet pipe 3 and is also used for controlling the water flow of the outlet pipe 3; the return pipe 6 is provided with a return pipe regulating valve 7 for controlling the return water flow of the return pipe 6.
In the case of a constant power of the pump 2, it is not sufficient to adjust the opening of the valve 4 only by reducing the outlet pipe, but the return pipe 6 is also required to redirect the pumped waste water exceeding the required amount back to the waste water tank 1. The outlet pipe regulating valve 4 and the return pipe regulating valve 7 may be manually or automatically adjusted.
For automated control, the wastewater recovery device further comprises: the controller and a liquid level sensor are arranged in the wastewater tank; the controller is in signal connection with the liquid level sensor and is used for controlling the outlet pipe regulating valve 4 and the return pipe regulating valve 7 according to the liquid level height of the wastewater tank 1 acquired by the liquid level sensor. Therefore, the outlet pipe regulating valve 4 and the return pipe regulating valve 7 are solenoid valves or electronic expansion valves, and the opening degree can be adjusted according to the signal of the controller.
In practical application, the wastewater overflowing from the spiral slag extractor directly enters a wastewater tank through a pipeline; the waste water extruded by the slag squeezing machine is easy to block a pump because of impurities such as plastic sheets and the like, so the waste water is filtered by an open isolation groove, and the impurities are screened and then enter a waste water tank. The pump pumps the waste water from the waste water tank out through the outlet pipe into the pulping zone of the drum pulper as water for pulping. According to actual needs, the water flow flowing into the pulping area is controlled by combining an outlet pipe regulating valve, a return pipe regulating valve and the like.
The embodiment can recycle the residual waste water in the process of extracting waste residues in the paper-making disintegrating section, reduces the discharge of waste water, saves the cost of waste water treatment and is environment-friendly.
Example two
The embodiment provides a method for recycling waste water of a paper-making disintegrating section, which is implemented on the basis of the device in the embodiment, transfers the recycled waste water into a pulping area for recycling, and ensures that the disintegrating concentration is in a specified range.
FIG. 3 is a flow chart of a method for recycling wastewater according to the second embodiment of the present invention. The method for recycling the wastewater comprises the following steps:
and S11, calculating the recovered water amount according to the water flow of the outlet pipe acquired by the flow transmitter.
On the basis of the wastewater recovery device of the embodiment, the water flow of the outlet pipe is obtained by the flow transmitter. The display mode of the flow transmitter comprises an accumulated flow and an instantaneous flow, and the recovered water amount is calculated in real time according to the data of the flow transmitter.
And S12, acquiring the weight of the waste paper.
The weight of the used paper fed into the pulp crushing zone is obtained by the weighing device.
And S13, calculating the water demand for disintegration.
Waste paper weight (100% -waste paper moisture) (100% -impurity content) + water demand for disintegration + concentration of disintegrated water + concentration of recovered water + concentration of waste water = concentration of required disintegration (water demand for disintegration + weight of waste paper + water content of waste paper + amount of recovered water).
Wherein, the water content, impurity content, concentration of the crushed water and concentration of the waste water are preset parameters. In general, the water content of the waste paper takes 12%, the impurity content takes 10%, the concentration of the crushed water takes 0.5%, the concentration of the waste water can be actually measured, the waste water concentration can be calculated according to the last pulp crushing condition, and a reasonable value can be set according to the historical measurement result. According to the requirements of the working conditions of the drum pulper, the required pulping concentration is 14-22%.
Furthermore, when the wastewater is transferred to the pulping area, the liquid level of the wastewater tank is controlled. FIG. 4 is a flow chart of a wastewater tank liquid level control method in the second embodiment of the invention. As shown in fig. 4, the method for recycling wastewater further comprises the following steps:
s21, setting the required liquid level of the waste water tank.
In order to prevent damage to the pump due to idling, a minimum permissible level, i.e. the desired level, is set for the waste.
And S22, acquiring the actual liquid level of the wastewater tank through the liquid level sensor.
The liquid level sensor is arranged in the wastewater tank, acquires the actual liquid level of the wastewater tank in real time and sends the actual liquid level to the controller.
And S23, comparing the actual liquid level with the required liquid level, and adjusting the opening degree of the return pipe adjusting valve and the outlet pipe adjusting valve according to the comparison result.
If the actual liquid level is larger than the required liquid level, the opening degree of the outlet pipe regulating valve is increased, and the opening degree of the return pipe regulating valve is reduced; if the actual liquid level is less than or equal to the required liquid level, the opening degree of the outlet pipe regulating valve is reduced, and the opening degree of the return pipe regulating valve is increased. The opening of the outlet pipe regulating valve =100% -the opening of the return pipe regulating valve.
Specifically, the opening of the outlet pipe regulating valve and the opening of the return pipe regulating valve can be preset or dynamically regulated by the controller.
The waste water recovery device provided by the embodiment of the invention can recycle waste water, control the water demand for the pulping in the pulping area, realize the automatic adjustment of water inflow, and keep the concentration of raw materials in the pulping area within the required range of the pulper.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (5)
1. A method for recycling waste water of a paper-making disintegrating section is characterized in that the method adopts a waste water recycling device of the paper-making disintegrating section, and the waste water recycling device comprises:
the inlet of the waste water tank is connected with a waste water discharge pipeline, the outlet of the waste water tank is connected with an outlet pipe through a pump, the outlet pipe is connected with a pulping area, a flow transmitter is arranged on the outlet pipe and at the downstream of the pump and used for measuring the water flow of the outlet pipe, a return pipe is arranged on the outlet pipe and between the pump and the flow transmitter and connected to the waste water tank, a return pipe regulating valve is arranged on the return pipe, an outlet pipe regulating valve is arranged on the outlet pipe, and an isolation tank is arranged between the waste water discharge pipeline and a water outlet of the slag squeezing machine; a screen is arranged in the isolation groove;
the method for recycling the wastewater comprises the following steps:
calculating the recovered water amount according to the water flow of the outlet pipe acquired by the flow transmitter;
obtaining the weight of waste paper;
calculating the water demand for fragmentation: waste paper weight (100% -waste paper moisture) (100% -impurity content) + water demand for disintegration + concentration of disintegrated water + concentration of recovered water = concentration of required disintegration (water demand for disintegration + weight of waste paper + water content of waste paper + amount of recovered water);
wherein, the water content, impurity content, concentration of the crushed water and concentration of the waste water are preset parameters;
the water demand for the pulping in the pulping area is controlled, the automatic adjustment of the water inflow is realized, and the concentration of the raw materials in the pulping area can be kept within the required range of the pulper.
2. The method for recycling wastewater according to claim 1, wherein the wastewater recycling apparatus further comprises:
the controller and a liquid level sensor are arranged in the wastewater tank;
the controller is in signal connection with the liquid level sensor and is used for controlling the outlet pipe regulating valve and the return pipe regulating valve according to the liquid level height of the wastewater tank acquired by the liquid level sensor.
3. The method for recycling wastewater according to claim 2, further comprising:
setting a required liquid level of the wastewater tank;
acquiring the actual liquid level of the wastewater tank through the liquid level sensor;
and comparing the actual liquid level with the required liquid level, and adjusting the opening degrees of the return pipe regulating valve and the outlet pipe regulating valve according to the comparison result.
4. The method for recycling wastewater according to claim 3, wherein comparing the actual liquid level with the desired liquid level and adjusting the opening degrees of the return pipe regulating valve and the outlet pipe regulating valve according to the comparison result comprises:
if the actual liquid level is larger than the required liquid level, the opening degree of the outlet pipe regulating valve is increased, and the opening degree of the return pipe regulating valve is reduced;
if the actual liquid level is less than or equal to the required liquid level, the opening degree of the outlet pipe regulating valve is reduced, and the opening degree of the return pipe regulating valve is increased.
5. The method for recycling wastewater according to claim 4, wherein:
the opening of the outlet pipe regulating valve =100% -the opening of the return pipe regulating valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811575127.0A CN109610215B (en) | 2018-12-21 | 2018-12-21 | Waste water recovery device of paper-making disintegrating section and utilization method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811575127.0A CN109610215B (en) | 2018-12-21 | 2018-12-21 | Waste water recovery device of paper-making disintegrating section and utilization method |
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| CN109610215A CN109610215A (en) | 2019-04-12 |
| CN109610215B true CN109610215B (en) | 2021-09-24 |
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| CN208088000U (en) * | 2018-04-20 | 2018-11-13 | 广东理文卫生用纸有限公司 | A kind of automation pulping system of the recyclable cycle of paper for daily use |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE1199244B (en) * | 1963-10-29 | 1965-08-26 | Olin Mathieson | Process for the production of imidobisulfuric acid fluoride |
| CN102154868A (en) * | 2011-01-18 | 2011-08-17 | 维达纸业（江门）有限公司 | Automatic frequency conversion pulping system in household paper manufacturing process |
| CN104404809B (en) * | 2014-10-31 | 2016-03-16 | 玖龙纸业（太仓）有限公司 | Waste stuff treating apparatus |
| JP2017115259A (en) * | 2015-12-24 | 2017-06-29 | デュプロ精工株式会社 | Waste paper recycling processing apparatus |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201581139U (en) * | 2010-01-11 | 2010-09-15 | 灵宝市开源矿业有限责任公司 | Storage tank device with adjustable liquid level |
| CN204247033U (en) * | 2014-09-28 | 2015-04-08 | 攀枝花钢企欣宇化工有限公司 | Flush of hydrogen gas tower cleaning solution recycling system |
| CN204780447U (en) * | 2015-05-29 | 2015-11-18 | 东莞玖龙纸业有限公司 | Improve device of plain boiled water pureness degree |
| CN208088000U (en) * | 2018-04-20 | 2018-11-13 | 广东理文卫生用纸有限公司 | A kind of automation pulping system of the recyclable cycle of paper for daily use |
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