CN212742006U - Recovery system for white water of paper machine - Google Patents
Recovery system for white water of paper machine Download PDFInfo
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- CN212742006U CN212742006U CN202021170808.1U CN202021170808U CN212742006U CN 212742006 U CN212742006 U CN 212742006U CN 202021170808 U CN202021170808 U CN 202021170808U CN 212742006 U CN212742006 U CN 212742006U
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Abstract
The utility model provides a white water recovery system of a paper machine, which comprises a paper machine mesh bottom water tank, an overflow white water tank, a first pipeline, a cushion layer pulp tank, a second pipeline, a mixer, a third pipeline, a filter, a turbid filtrate tank, a clear filtrate tank, an ultra-clear filtrate tank and a recovery filtrate tank; the paper machine wire white water tank is used for recovering white water generated by a paper machine; the overflow white water tank is used for collecting white water overflowing from the paper machine wire white water tank, the cushion layer slurry tank is used for collecting cushion layer slurry, and a liquid outlet of the mixer is communicated with a liquid inlet of the filter through the third pipeline; and the liquid outlet of the filter is respectively communicated with the turbid filtrate tank, the clear filtrate tank, the ultra-clear filtrate tank and the recovered filtrate tank through pipelines. The utility model discloses a recovery of plain boiled water can realize the proportional control of plain boiled water and bed course thick liquids simultaneously, and the filtrating quality that the filter came out is higher, and this paper machine plain boiled water recovery system efficiency is more, controls convenience more.
Description
Technical Field
The utility model relates to a paper machine field especially relates to a paper machine plain boiled water recovery system.
Background
In recent years, the more strict the national requirements on environmental protection, the higher and higher the sewage discharge standard, the paper making industry is the water consumers in China, and the wastewater discharged by paper mills is difficult to recycle and has serious influence on the environment. In the papermaking production process, a large amount of water is consumed in the papermaking pulping process, the discharge amount of white water is large, resource waste is caused, and the water consumption can be greatly reduced by recycling the white water.
In the prior art, the recovery capacity of the paper making white water is often insufficient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a plain boiled water recovery system of paper machine to solve the shortcoming among the prior art and not enough.
The utility model discloses a plain boiled water recovery system of paper machine, include:
the paper machine net lower white water tank, the overflow white water tank, the first pipeline, the cushion layer pulp tank, the second pipeline, the mixer with a liquid inlet and a liquid outlet, the third pipeline, the filter, the turbid filtrate tank, the clear filtrate tank, the ultra-clear filtrate tank and the recovered filtrate tank;
the paper machine net white water tank is used for recovering white water generated by a paper machine, the bottom of the cavity of the paper machine net white water tank is communicated with a fan pump through a pipeline, and the fan pump conveys the thick white water in the cavity of the paper machine net white water tank to the paper machine;
the overflow white water tank is used for collecting white water overflowing from the paper machine wire white water tank, the bottom of a cavity of the overflow white water tank is communicated with a liquid inlet of the mixer through the first pipeline, and the inner wall of the cavity of the overflow white water tank is provided with a first liquid level meter; the first pipeline is provided with an overflow white water pump which is electrically connected with a first frequency converter; the first liquid level meter and the first frequency converter are both electrically connected with a first liquid level controller; the first pipeline is also provided with a first flow control valve and a first flow meter, and the first flow control valve and the first flow meter are positioned on the first pipeline between the overflow white water pump and the mixer; the first flow control valve and the first flow meter are electrically connected with a first flow interlocking controller;
the cushion layer slurry pool is used for collecting cushion layer slurry and is communicated with the liquid inlet of the mixer through the second pipeline; a second flow control valve and a second flowmeter are arranged on the second pipeline; the second flow interlocking controller is electrically connected with the second flow control valve, the second flow meter and the first flow interlocking controller respectively;
the liquid outlet of the mixer is communicated with the liquid inlet of the filter through the third pipeline;
and the liquid outlet of the filter is respectively communicated with the turbid filtrate tank, the clear filtrate tank, the ultra-clear filtrate tank and the recovered filtrate tank through pipelines.
Compared with the prior art, the utility model discloses a recovery of plain boiled water has been realized to paper machine plain boiled water recovery system, can realize the proportional control of plain boiled water and cushion layer thick liquids simultaneously, and the filtrating quality that the filter came out is higher, and this paper machine plain boiled water recovery system efficiency is more, controls convenience more.
In a preferred or optional embodiment, the third pipeline is further provided with a concentration meter, and a concentration interlocking controller is electrically connected with the concentration meter and the second flow interlocking controller respectively.
In a preferred or optional embodiment, the device further comprises a fourth pipeline, a second liquid level meter, a turbid filtrate pump, a first liquid level control valve and a second liquid level controller; the bottom of the turbid filtrate tank is communicated with the liquid inlet of the mixer through the fourth pipeline, and the inner wall of the turbid filtrate tank is provided with the second liquid level meter; the turbid filtrate pump and the first liquid level control valve are sequentially arranged on the fourth pipeline along the direction from the turbid filtrate tank to the mixer; and the second liquid level controller is respectively and electrically connected with the first liquid level control valve, the second liquid level meter and the first liquid level controller.
In a preferred or optional embodiment, the device further comprises a fifth pipeline, one end of the fifth pipeline is communicated with the fourth pipeline between the turbid filtrate pump and the mixer, and the other end of the fifth pipeline is communicated with a spraying water faucet.
In a preferred or optional embodiment, the system further comprises a first manual valve disposed on the first conduit between the overflow white water pool and the overflow white water pump.
In a preferred or optional embodiment, the apparatus further comprises a second manual valve, wherein the second manual valve is arranged on the fourth pipeline and is positioned between the turbid filtrate pump and the turbid filtrate pool.
In a preferred or optional embodiment, the system further comprises a third manual valve, and the third manual valve is arranged on the fifth pipeline.
In a preferred or alternative embodiment, the filter is a multi-disc vacuum filter.
Drawings
FIG. 1 is a schematic structural view of a white water recovery system of a paper machine according to the present invention;
Detailed Description
Referring to fig. 1, the white water recycling system of the paper machine in this embodiment includes a white water pool 1 of a paper machine wire, an overflow white water pool 2, a first pipe 21, a cushion slurry pool 3, a second pipe 31, a mixer 4 with a liquid inlet and a liquid outlet, a third pipe 41, a filter 5, a turbid filtrate pool 51, a clear filtrate pool 52, an ultra-clear filtrate pool 53, and a recycling filtrate pool 54;
the paper machine net white water pool 1 is used for recovering white water generated by a paper machine, the bottom of a cavity of the paper machine net white water pool is communicated with a fan pump 11 through a pipeline, and the fan pump 11 conveys the thick white water in the cavity of the paper machine net white water pool 1 to the paper machine. White water generated in the production of a paper machine is collected in a paper machine net white water pool 1 below the paper machine, and according to the pulp water balance of the system, part of the thick white water in the paper machine net white water pool 1 can be directly used as pulp to be diluted and recycled, so that the thick white water is conveyed to the paper machine by a pulp pump 11 for other treatment, and the remaining white water overflows to an overflow white water pool 2 through the structural design of the paper machine net white water pool 1.
The overflow white water tank 2 is used for collecting white water overflowing from the paper machine wire white water tank 1, the bottom of the cavity of the overflow white water tank is communicated with the liquid inlet of the mixer 4 through the first pipeline 21, and the inner wall of the cavity of the overflow white water tank is provided with a first liquid level meter 22; an overflow white water pump 23 is arranged on the first pipeline 21, and the overflow white water pump 23 conveys the white water in the overflow white water tank 2 to the mixer 4; the overflow white water pump 23 is electrically connected to a first inverter 24; the first liquid level meter 22 and the first frequency converter 24 are both electrically connected with a first liquid level controller 25; a first flow control valve 26 and a first flow meter 27 are further arranged on the first pipeline 21, and the first flow control valve 26 and the first flow meter 27 are positioned on the first pipeline 21 between the overflow white water pump 23 and the mixer 4; the first flow control valve 26 and the first flow meter 27 are both electrically connected to a first flow interlock controller 28;
the cushion slurry tank 3 is used for collecting cushion slurry and is communicated with a liquid inlet of the mixer 4 through the second pipeline 31; a second flow control valve 32 and a second flow meter 33 are arranged on the second pipeline 31; a second flow interlock controller 34 is electrically connected to the second flow control valve 32, the second flow meter 33, and the first flow interlock controller 28, respectively.
The liquid outlet of the mixer 4 is communicated with the liquid inlet of the filter 5 through the third pipeline 41.
The liquid outlet of the filter 5 is respectively communicated with the turbid filtrate tank 51, the clear filtrate tank 52, the ultra-clear filtrate tank 53 and the recovered filtrate tank 54 through pipelines. Preferably, the filter 5 is a multi-disc vacuum filter 5.
The specific control process of the above technical solution is explained as follows:
firstly, the first liquid level meter 22 is installed in the overflow white water pool 2, the white water in the overflow white water pool 2 is more and more along with time, the redundant white water needs to be sent to the multi-disc vacuum filter 5 through the overflow white water pump 23 for processing, and the multi-disc vacuum filter 5 can ensure better filtering effect only when the white water with stable flow enters. Therefore, the first liquid level meter 22 detects the liquid level of the overflow white water pool 2, the detection position of the first liquid level meter 22 can be set as required, when the liquid level reaches the detection position, a signal is sent to the first liquid level controller 25, and the first liquid level controller 25 receives the signal from the first liquid level meter 22 and controls the first inverter 24 to start the overflow white water pump 23 or controls the overflow white water pump 23 to adjust the conveying amount of the overflow white water pump 23. The first level gauge 22 can ensure the stability of the liquid level of the overflow white water pool 2, make the system in a balanced state, and also ensure that the overflow white water pump 23 is not evacuated.
In addition, a path of cushion slurry needs to be introduced before the overflow white water pool 2 enters the multi-disc vacuum filter 5, and the cushion slurry is needed by the multi-disc vacuum filter 5. Therefore, a mixer 4 is provided before the multi-disk type vacuum filter 5 so that the mat stock and the white water are uniformly mixed in the mixer 4, and the mat stock and the white water are mixed in a specific and accurate ratio.
Therefore, on the one hand, a second flow meter 33 and a second flow control valve 32 are provided on the second pipe 31, the second flow meter 33 detects the flow rate of the mat slurry in the second pipe 31 and sends a signal to a second flow interlock controller 34, and the second flow interlock controller 34 receives the signal of the second flow meter 33 and controls the power of the second flow control valve 32, thereby achieving the flow control of the mat slurry in the second pipe 31.
On the other hand, a first flow control valve 26 and a first flow meter 27 are disposed in the first conduit 21, a first flow interlock controller 28 is electrically connected to the first flow control valve 26 and the first flow meter 27, respectively, the first flow meter 27 detects the flow rate of the white water in the first conduit 21 and sends a signal to the first flow interlock controller 28, and the first flow interlock controller 28 receives the signal from the first flow meter 27 and controls the power of the first flow control valve 26, thereby realizing the flow control of the white water in the first conduit 21. Further, the first flow interlock controller 28 and the second flow interlock controller 34 are electrically connected, so that the flow rates of both the first duct 21 and the second duct 31 can be interlocked, and the ratio control of the white water and the cushion slurry can be realized. The first flow interlock controller 28 may control the power of the first flow control valve 26 based on signals from the first flow meter 27 and the second flow interlock controller 34, and similarly, the second flow interlock controller 34 may control the power of the second flow control valve 32 based on signals from the second flow meter 33 and the first flow interlock controller 28.
In this embodiment, the third pipe 41 is further provided with a concentration meter 42, and a concentration interlock controller 43 is electrically connected to the concentration meter 42 and the second flow interlock controller 34, respectively. In order to accurately control the concentration of the mixture exiting from the mixer 4, a concentration meter 42 is provided in the third pipe 41, the concentration meter 42 detects the concentration of the mixture in the third pipe 41 and outputs a signal to a concentration interlock controller 43, and the concentration interlock controller 43 controls the amount of the mat slurry entering the mixer 4 by interlocking adjustment of the concentration and second flow interlock controller 34, that is, the concentration of the mixture in the third pipe 41 exiting from the mixer 4 can be further controlled.
As an embodiment, the white water recovery system of the paper machine according to this embodiment further includes a fourth pipe 511, a second liquid level meter 512, a turbid filtrate pump 513, a first liquid level control valve 514, and a second liquid level controller 515; the bottom of the turbid filtrate tank 51 is communicated with the liquid inlet of the mixer 4 through the fourth pipeline 511, and the inner wall of the chamber is provided with the second liquid level meter 512; the turbid filtrate pump 513 and the first liquid level control valve 514 are sequentially arranged on the fourth pipeline 511 in the direction from the turbid filtrate tank 51 to the mixer 4, turbid filtrate can be conveyed by the turbid filtrate pump 513, and the conveying amount of turbid filtrate can be accurately controlled by the first liquid level control valve 514; the second liquid level controller 515 is electrically connected to the first liquid level control valve 514, the second liquid level meter 512, and the first liquid level controller 25, respectively. The mixture in the third pipeline 41 is filtered by the multi-disc vacuum filter 5 to generate 3 kinds of filtrates with different cleanliness, namely turbid filtrate, clear filtrate and ultra-clear filtrate, and additionally, redundant recyclable slurry, and the turbid filtrate, the clear filtrate, the ultra-clear filtrate and the recyclable slurry are respectively introduced into the corresponding turbid filtrate pool 51, the clear filtrate pool 52, the ultra-clear filtrate pool 53 and the recyclable filtrate pool 54. Clear filtrate, ultra-clear filtrate and recovered pulp can be directly recycled to a paper machine system, while turbid filtrate cannot be recycled due to low cleanliness, and at the moment, part of turbid filtrate can be introduced into the mixer 4, so that the two benefits are achieved, on one hand, the turbid filtrate is fully utilized, discharge is prevented, and pulp is continuously recycled, and on the other hand, when the speed of the paper machine changes, white water in the overflow white water tank 2 fluctuates and the fluctuation frequency is high, and the liquid level control of the overflow white water tank 2 can not necessarily meet and guarantee the conveying capacity and conveying stability of the white water, so that the amount of the white water required by normal and stable operation of the multi-disc vacuum filter 5 is met by adding the turbid filtrate into the mixer 4. Therefore, the fourth pipe 511, the second level meter 512, the turbid filtrate pump 513, the first level control valve 514, and the second level controller 515 are provided, the second level controller 515 and the first level controller 25 form an interlock control, and the white water in the overflow white water tank 2 and the turbid filtrate in the turbid filtrate tank 51 are simultaneously fed to the mixer 4, and flow rates of both are controlled. The control loop can simultaneously consider the liquid level balance of the turbid filtrate tank 51 and the overflow white water tank 2, and also realizes the stable water amount entering the multi-disc vacuum filter 5.
In addition, the white water recycling system of the paper machine of the present embodiment includes a fifth pipe 516, one end of the fifth pipe 516 is connected to the fourth pipe 511 between the turbid filtrate pump 513 and the mixer 4, and the other end is connected to a spraying faucet 517. The other part of the turbid filtrate can also be used for the spray cleaning of the multi-disc vacuum filter 5.
In addition, in order to facilitate manual shut down of the system when a machine fails or production stops, the paper machine white water recovery system further comprises a first manual valve 29, the first manual valve 29 being disposed on the first conduit 21 and between the overflow white water pool 2 and the overflow white water pump 23. The paper machine white water recovery system further comprises a second manual valve 519, said second manual valve 519 being arranged on said fourth conduit 511 and being located between said turbid filtrate pump 513 and the turbid filtrate tank 51. The paper machine white water recovery system further comprises a third manual valve 518, said third manual valve 518 being arranged in said fifth conduit 516 for ease of use.
The white water recovery system of the paper machine can realize the simplest flow control, ensure simple and understandable operation and optimize the system cost; and the control of the white water recovery system is stable, the effect of treating system water is ensured, and the guarantee is provided for the white water recycling and the stable production of paper pages of the paper machine.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (8)
1. A paper machine white water recovery system, comprising:
the paper machine net lower white water tank, the overflow white water tank, the first pipeline, the cushion layer pulp tank, the second pipeline, the mixer with a liquid inlet and a liquid outlet, the third pipeline, the filter, the turbid filtrate tank, the clear filtrate tank, the ultra-clear filtrate tank and the recovered filtrate tank;
the paper machine net white water tank is used for recovering white water generated by a paper machine, the bottom of the cavity of the paper machine net white water tank is communicated with a fan pump through a pipeline, and the fan pump conveys the thick white water in the cavity of the paper machine net white water tank to the paper machine;
the overflow white water tank is used for collecting white water overflowing from the paper machine wire white water tank, the bottom of the cavity of the overflow white water tank is communicated with the liquid inlet of the mixer through the first pipeline, and the inner wall of the cavity of the overflow white water tank is provided with a first liquid level meter; the first pipeline is provided with an overflow white water pump which is electrically connected with a first frequency converter; the first liquid level meter and the first frequency converter are both electrically connected with a first liquid level controller; the first pipeline is also provided with a first flow control valve and a first flow meter, and the first flow control valve and the first flow meter are positioned on the first pipeline between the overflow white water pump and the mixer; the first flow control valve and the first flow meter are electrically connected with a first flow interlocking controller;
the cushion layer slurry pool is used for collecting cushion layer slurry and is communicated with the liquid inlet of the mixer through the second pipeline; a second flow control valve and a second flowmeter are arranged on the second pipeline; the second flow interlocking controller is electrically connected with the second flow control valve, the second flow meter and the first flow interlocking controller respectively;
the liquid outlet of the mixer is communicated with the liquid inlet of the filter through the third pipeline;
and the liquid outlet of the filter is respectively communicated with the turbid filtrate tank, the clear filtrate tank, the ultra-clear filtrate tank and the recovered filtrate tank through pipelines.
2. A paper machine white water recovery system according to claim 1, characterized in that: and the third pipeline is also provided with a concentration meter, and a concentration interlocking controller is electrically connected with the concentration meter and the second flow interlocking controller respectively.
3. A paper machine white water recovery system according to claim 2, characterized in that: the device also comprises a fourth pipeline, a second liquid level meter, a turbid filtrate pump, a first liquid level control valve and a second liquid level controller; the bottom of the turbid filtrate tank is communicated with the liquid inlet of the mixer through the fourth pipeline, and the inner wall of the turbid filtrate tank is provided with the second liquid level meter; the turbid filtrate pump and the first liquid level control valve are sequentially arranged on the fourth pipeline along the direction from the turbid filtrate tank to the mixer; and the second liquid level controller is respectively and electrically connected with the first liquid level control valve, the second liquid level meter and the first liquid level controller.
4. A paper machine white water recovery system according to claim 3, characterized in that: the device also comprises a fifth pipeline, wherein one end of the fifth pipeline is communicated with the fourth pipeline between the turbid filtrate pump and the mixer, and the other end of the fifth pipeline is communicated with a spraying faucet.
5. A paper machine white water recovery system according to claim 4, characterized in that: the first manual valve is arranged on the first pipeline and is positioned between the overflow white water pool and the overflow white water pump.
6. A paper machine white water recovery system according to claim 5, characterized in that: the second manual valve is arranged on the fourth pipeline and is positioned between the turbid filtrate pump and the turbid filtrate pool.
7. A paper machine white water recovery system according to claim 6, characterized in that: the third manual valve is arranged on the fifth pipeline.
8. A paper machine white water recovery system according to any one of claims 1-4, 6 and 7, characterized in that: the filter is a multi-disc vacuum filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170808.1U CN212742006U (en) | 2020-06-23 | 2020-06-23 | Recovery system for white water of paper machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170808.1U CN212742006U (en) | 2020-06-23 | 2020-06-23 | Recovery system for white water of paper machine |
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| Publication Number | Publication Date |
|---|---|
| CN212742006U true CN212742006U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021170808.1U Active CN212742006U (en) | 2020-06-23 | 2020-06-23 | Recovery system for white water of paper machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212742006U (en) |
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2020
- 2020-06-23 CN CN202021170808.1U patent/CN212742006U/en active Active
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