CN111636232A - Two-section type high-concentration slag separator, pulp inlet concentration control method thereof and storage medium - Google Patents
Two-section type high-concentration slag separator, pulp inlet concentration control method thereof and storage medium Download PDFInfo
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- CN111636232A CN111636232A CN202010496099.4A CN202010496099A CN111636232A CN 111636232 A CN111636232 A CN 111636232A CN 202010496099 A CN202010496099 A CN 202010496099A CN 111636232 A CN111636232 A CN 111636232A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
- G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
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Abstract
The invention relates to a two-section high-concentration slag separator, a slurry inlet concentration control method thereof and a storage medium, which comprise a first section high-concentration slag separator and a second section high-concentration slag separator, wherein the first section high-concentration slag separator is connected with a slurry inlet pipe, the first section high-concentration slag separator is connected with a dilution tank, the dilution tank is connected with a water pipe, the dilution tank is also connected with the second section high-concentration slag separator, the second section high-concentration slag separator is connected with a second slurry outlet pipe, a concentration measuring instrument is arranged in the pulp inlet pipe close to the first section of the high-concentration slag separator to measure the pulp inlet concentration C1 of the first section of the high-concentration slag separator, the water pipe close to the dilution tank is provided with the first flow meter to measure the water inflow flow1, and the second slurry outlet pipe close to the second section of high-concentration slag remover is provided with the second flow meter to measure the slurry outflow flow2, so that the two-section type high-concentration slag remover accurately controls the slurry inlet concentration of the second section of high-concentration slag remover, and the fiber recovery rate of the two-section type high-concentration slag remover can be improved.
Description
Technical Field
The invention relates to control of pulp inlet concentration of a slag separator, in particular to a two-section type high-concentration slag separator, a pulp inlet concentration control method thereof and a storage medium.
Background
At present, in the process of waste paper recycling pulping, after a series of filtering operations, pulp formed by dissolving waste paper in a solution can be filtered to obtain appropriate pulp, and then papermaking is carried out, so that the recycling of the waste paper is realized. However, the slurry contains a large amount of heavy slag such as glass slag, aluminum can, and steel wire rope, and if the heavy slag is not removed in time, the heavy slag will wear the subsequent cleaning equipment, such as high-precision screen cylinder and grinding plate, which are expensive, and the replacement of the high-precision screen cylinder and grinding plate will cause great loss to the paper mill.
Therefore, the high-concentration slag remover is needed to be used in the process of removing the heavy slag, but the fiber loss rate of the common single-section high-concentration slag remover is higher, so more and more paper mills adopt the two-section high-concentration slag remover to improve the fiber recovery rate. Although the existing two-stage type high consistency slag remover is used to a high degree, it still has the following disadvantages:
because the pulp inlet concentration of the second section of high-concentration slag separator is difficult to control, if the pulp inlet concentration of the second section of high-concentration slag separator is not controlled in an effective range, the slag removal efficiency of the second section of high-concentration slag separator is low, and the subsequent pulping process is influenced;
disclosure of Invention
The invention provides a two-stage high-concentration slag separator, a pulp inlet concentration control method thereof and a storage medium, which are used for accurately controlling the pulp inlet concentration of the two-stage high-concentration slag separator and improving the fiber recovery rate.
Therefore, a two-section high-concentration slag remover is provided,
comprises a first section of high-concentration slag separator, a second section of high-concentration slag separator, a dilution tank, a first slurry outlet pipe and a second slurry outlet pipe,
the pulp inlet of the first section of high-concentration slag separator is connected with an external pulp inlet pipe, and the pulp outlet of the first section of high-concentration slag separator is connected with the pulp inlet of the dilution tank through a first pulp outlet pipe so as to transmit the first section of good pulp filtered by the first section of high-concentration slag separator;
a water inlet interface of the dilution tank takes water from the outside through a water pipe, a pulp outlet of the dilution tank is connected with a pulp inlet of a second section of high-concentration slag separator, and a pulp outlet of the second section of high-concentration slag separator is connected with a second pulp outlet pipe so as to transmit second section of good pulp filtered by the second section of high-concentration slag separator, wherein the pulp outlet of the second section of high-concentration slag separator is higher than the pulp inlet;
a concentration measuring instrument is arranged in a pulp inlet pipe close to a pulp inlet of the first section of high-concentration slag separator and used for measuring pulp inlet concentration C1 of the first section of high-concentration slag separator, a first flow meter is arranged in a water pipe close to a water inlet interface of the dilution tank and used for measuring water inflow flow1, and a second flow meter is arranged in a second pulp outlet pipe close to a pulp outlet of the second section of high-concentration slag separator and used for measuring pulp outflow flow 2.
Preferably, the system controller is electrically connected with the concentration measuring instrument, the first flowmeter and the second flowmeter respectively.
Preferably, the second-stage high-concentration slag remover is a JUNKTRAP type intermittent slag removal structure.
The pulp concentration control method of the two-stage high consistency cleaner further comprises a memory arranged to store computer executable instructions that, when executed, the system controller runs the following steps S1-S7 to control the pulp concentration C2 of the second stage high consistency cleaner:
s1, collecting water inflow flow1 and slurry outflow flow 2;
s2, controlling the water inflow flow1 to be lower than the pulp outflow flow 2;
s3, collecting the pulp inlet concentration C1, and obtaining the slag discharge concentration N of the first section of high-concentration slag separator according to the pulp inlet concentration C1;
s4, obtaining the difference between the water inflow flow1 and the slurry outlet flow2 as the slag discharge flow F of the first-stage height slag remover;
s5, calculating the pulp inlet absolute dry weight G of the second section of the high-concentration slag separator through G ═ F × N;
s6, calculating the pulp inlet concentration C2 of the second section of high-concentration slag separator according to the pulp inlet absolute dry weight G;
and S7, controlling the water inflow flow1 and/or the pulp outflow flow2 until the pulp inlet concentration C2 is kept within a set range value.
Preferably, in step S3, the pulp feed concentration C1 is substituted as a variable into N ═ C1 × P to calculate the slag discharge concentration N of the first-stage high consistency cleaner, where P is the set slag discharge concentration ratio of the first-stage high consistency cleaner.
Preferably, the deslagging concentration ratio of the first-stage high-concentration deslagging device is 1.2.
Preferably, in step S6, the pulp inlet concentration C2 of the second stage high-concentration slag separator is obtained by C2 ═ G/flow 2.
Preferably, in step S4, the slag discharge flow F of the first-stage height slag remover is obtained by F ═ flow2-flow 1.
Preferably, the step S7 further includes:
comparing the pulp inlet concentration C2 with a set range, judging whether the pulp inlet concentration C2 is within the set range, and if the pulp inlet concentration C2 is higher than the set range value, controlling the water inlet flow1 and/or controlling the pulp outlet flow2 to increase; if the pulp inlet concentration C2 is lower than the set range value, controlling the water inlet flow1 and/or controlling the pulp outlet flow2 to be reduced; if the slurry inlet concentration C2 is within the set range, the operation is not performed.
A storage medium storing a computer program which, when executed by a processor, implements the method described above.
Has the advantages that:
the two-section high-concentration slag remover comprises a first section high-concentration slag remover and a second section high-concentration slag remover, waste paper pulp liquid is filtered by the first section high-concentration slag remover to obtain first section good pulp, the first section good pulp flows into a dilution tank to be diluted and then flows into the second section high-concentration slag remover, the second section good pulp is discharged from a pulp outlet of the second section high-concentration slag remover, the two-section high-concentration slag remover accurately controls the pulp inlet concentration of the second section high-concentration slag remover, and the fiber recovery rate of the two-section high-concentration slag remover can be improved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of a two-stage high concentration slag remover according to the present invention;
FIG. 2 is a schematic structural diagram of an electronic device according to the present invention;
fig. 3 is a schematic structural diagram of a computer-readable storage medium according to the present invention.
Description of reference numerals: 1-a first section of high concentration slag remover; 2-a second section of high concentration slag separator; 3-a dilution tank; 4-a first flow meter; 5-a second flow meter; 6-concentration measuring instrument; 21-a processor; 22-a memory; 23-storage space; 24-program code; 31-program code.
Detailed Description
The invention is further described with reference to the following examples.
Referring to fig. 1, the two-stage high-consistency slag separator of the method for controlling the pulp inlet consistency of the two-stage high-consistency slag separator of the embodiment includes a first stage high-consistency slag separator 1 and a second stage high-consistency slag separator 2.
Wherein, the pulp inlet of the first section of high-concentration slag separator 1 is connected with a pulp inlet pipe to receive waste pulp liquid dissolved in the solution; the pulp inlet pipe is provided with a concentration measuring instrument 6 in the pulp inlet close to the first section of the high-concentration slag separator 1 and used for measuring the pulp inlet concentration C1 of the first section of the high-concentration slag separator 1; the pulp outlet of the first section of high-concentration slag remover 1 is connected with the pulp inlet of the dilution tank 3 through two ends of a first pulp outlet pipe so as to transmit the first section of good pulp filtered by the first section of high-concentration slag remover 1; the water inlet interface of the dilution tank 3 is connected with a water pipe to take water from the outside, and the water pipe is provided with a first flow meter 4 at the water inlet interface near the dilution tank 3 to measure the water inflow flow1 in the dilution tank 3.
Second section high concentration slag separator 2 sets up to the intermittent type of JUNKTRAP formula and arranges sediment structure, the play thick liquid mouth of dilution tank 3 is connected with the thick liquid mouth that advances of second section high concentration slag separator 2, with the thick liquid after diluting in the transmission dilution tank 3, the play thick liquid mouth and the second play thick liquid union coupling of second section high concentration slag separator 2, with the good thick liquid of second section after transmission second section high concentration slag separator 2 filters, the second play thick liquid pipe is provided with second flowmeter 5 in order to measure the play thick liquid flow of the good thick liquid of second section flow meter flow2 in the play thick liquid mouth department that is close to second section high concentration slag separator 2, the thick liquid after diluting in the dilution tank 3 flows into second section slag separator 2, make the liquid level of second section high concentration slag separator 2 rise to the high liquid level by low liquid level gradually, flow outside through second play thick liquid pipe after the liquid level reaches the play thick liquid mouth of second section high concentration slag separator.
In the slurry inlet concentration control method of the two-stage high-concentration slag separator of the embodiment, a system controller not shown in fig. 1 is further disposed in the two-stage high-concentration slag separator, and the system controller is electrically connected to the concentration measuring instrument 6, the first flowmeter 4, and the second flowmeter 5 respectively to collect signals.
Through the structure of foretell two-stage type high concentration scummer, can solve the problem that the thick liquid concentration C2 of advancing of second section high concentration scummer 2 is difficult to control well to improve the slagging-off efficiency of second section high concentration scummer 2, make things convenient for subsequent pulping process.
Based on the structure of the two-stage high-consistency slag separator, the system controller operates the following method to calculate the pulp inlet consistency C2 of the second stage high-consistency slag separator 2:
step S1: collecting water inflow flow1 in the dilution tank 3 and slurry outlet flow2 of second section good slurry;
step S2: controlling the water inflow of flow1 to achieve flow1 < flow 2;
specifically, in order to ensure that the slag is smoothly discharged from the first section of high-concentration slag remover 1 and the dilution water in the dilution tank 3 cannot be backflushed into the first section of high-concentration slag remover 1, the system controller controls the water inlet speed of the external water supply equipment, and further controls the water inlet flow1 to be smaller than the pulp outlet flow2 of the second section of good pulp.
Step S3: collecting the pulp inlet concentration C1 of the first-stage high-concentration slag separator 1, setting the slag discharging concentration ratio P (for example, 1.2) of the first-stage high-concentration slag separator 1, and calculating the slag discharging concentration N of the first-stage high-concentration slag separator 1 according to a formula N-C1P;
step S4: calculating the slag discharge flow F of the first-stage height slag remover as flow2-flow 1;
specifically, because the second section of high-concentration slag separator is set to be JUNKTRAP type intermittent slag removal, namely the slurry outlet flow of the second section of high-concentration slag separator flow2 is the slurry inlet flow of the second section of high-concentration slag separator, namely the slag removal flow F of the first section of high concentration slag separator is calculated as follows: f-flow 2-flow 1.
Step S5: calculating the pulp inlet absolute dry weight G-F-N of the second section of high-concentration slag separator;
specifically, the absolute dry weight is the quotient between the concentration and the flow, and the slag discharge concentration of the first-stage high-concentration slag remover 1 is: N-C1-P-C1-1.2, the absolute dry mass G of the pulp fed to the second high-consistency cleaner is: g ═ F × N ═ C1 × 1.2 (Flow2-Flow 1).
Step S6: calculating the pulp inlet concentration C2 of the second section of high-concentration slag separator as G/flow 2;
specifically, because the pulp inlet flow of the second-stage high-concentration slag separator is flow2, the pulp inlet concentration of the second-stage high-concentration slag separator can be calculated as follows: c2 ═ G/Flow2 ═ (Flow2-Flow1) × C × 1.2/Flow 2.
Step S7: controlling the water inflow flow1 or the slurry outflow flow2 to keep the slurry inlet concentration C2 within a set range value;
specifically, by setting the range of the pulp inlet concentration of the second-stage high-concentration deslagging device, the maintenance personnel of the paper mill controls the water inlet flow1 or the pulp outlet flow2 to increase if the pulp inlet concentration C2 calculated in step S6 exceeds the set range value, otherwise, the maintenance personnel do not act to ensure that the concentration C2 is kept within the set range value.
The beneficial effects of this embodiment:
(1) the pulp inlet concentration G of the second section of high-concentration slag remover can be calculated without arranging a concentration measuring instrument at the pulp inlet of the second section of high-concentration slag remover, so that the two-section type high-concentration slag remover can accurately control the pulp inlet concentration of the second section of high-concentration slag remover 2;
(2) the fiber recovery rate of the two-section high-concentration slag remover is improved by controlling the pulp inlet concentration C2 of the second-section high-concentration slag remover;
(3) the slurry inlet concentration C2 of the second-section high-concentration slag remover is controlled, so that the second-section high-concentration slag remover can be fully filtered to reduce the risk of damaging subsequent equipment.
It should be noted that:
the method of the present embodiment may be implemented by a method that is converted into program steps and apparatuses that can be stored in a computer storage medium and invoked and executed by a controller.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus nor is the particular language used to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the apparatus for detecting a wearing state of an electronic device according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
For example, fig. 2 shows a schematic structural diagram of an electronic device according to an embodiment of the invention. The electronic device conventionally comprises a processor 21 and a memory 22 arranged to store computer-executable instructions (program code). The memory 22 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory 22 has a storage space 23 storing program code 24 for performing any of the method steps in the embodiments. For example, the storage space 23 for the program code may comprise respective program codes 24 for implementing respective steps in the above method. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. Such a computer program product is typically a computer readable storage medium such as described in fig. 3. The computer readable storage medium may have memory segments, memory spaces, etc. arranged similarly to the memory 22 in the electronic device of fig. 2. The program code may be compressed, for example, in a suitable form. In general, the memory unit stores program code 31 for performing the steps of the method according to the invention, i.e. program code readable by a processor such as 21, which when run by an electronic device causes the electronic device to perform the individual steps of the method described above.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. The utility model provides a two-section type high concentration slag separator which characterized in that:
comprises a first section of high-concentration slag separator, a second section of high-concentration slag separator, a dilution tank, a first slurry outlet pipe and a second slurry outlet pipe,
the pulp inlet of the first section of high-concentration slag separator is connected with an external pulp inlet pipe, and the pulp outlet of the first section of high-concentration slag separator is connected with the pulp inlet of the dilution tank through a first pulp outlet pipe so as to transmit the first section of good pulp filtered by the first section of high-concentration slag separator;
a water inlet interface of the dilution tank takes water from the outside through a water pipe, a pulp outlet of the dilution tank is connected with a pulp inlet of a second section of high-concentration slag separator, and a pulp outlet of the second section of high-concentration slag separator is connected with a second pulp outlet pipe so as to transmit second section of good pulp filtered by the second section of high-concentration slag separator, wherein the pulp outlet of the second section of high-concentration slag separator is higher than the pulp inlet;
a concentration measuring instrument is arranged in a pulp inlet pipe close to a pulp inlet of the first section of high-concentration slag separator and used for measuring pulp inlet concentration C1 of the first section of high-concentration slag separator, a first flow meter is arranged in a water pipe close to a water inlet interface of the dilution tank and used for measuring water inflow flow1, and a second flow meter is arranged in a second pulp outlet pipe close to a pulp outlet of the second section of high-concentration slag separator and used for measuring pulp outflow flow 2.
2. The two-stage high concentration slag remover according to claim 1, further comprising a system controller, wherein the system controller is electrically connected to the concentration measuring instrument, the first flow meter and the second flow meter.
3. The two-stage high consistency deslagging device of claim 1 wherein the second stage high consistency deslagging device is a JUNKTRAP type intermittent deslagging structure.
4. The method of pulp concentration control in a two-stage high consistency cleaner of claim 2, further comprising a memory arranged to store computer executable instructions, wherein the executable instructions, when executed, the system controller runs the following steps S1-S7 to control the pulp concentration C2 of the second stage high consistency cleaner:
s1, collecting water inflow flow1 and slurry outflow flow 2;
s2, controlling the water inflow flow1 to be lower than the pulp outflow flow 2;
s3, collecting the pulp inlet concentration C1, and obtaining the slag discharge concentration N of the first section of high-concentration slag separator according to the pulp inlet concentration C1;
s4, obtaining the difference between the water inflow flow1 and the slurry outlet flow2 as the slag discharge flow F of the first-stage height slag remover;
s5, calculating the pulp inlet absolute dry weight G of the second section of the high-concentration slag separator through G ═ F × N;
s6, calculating the pulp inlet concentration C2 of the second section of high-concentration slag separator according to the pulp inlet absolute dry weight G;
and S7, controlling the water inflow flow1 and/or the pulp outflow flow2 until the pulp inlet concentration C2 is kept within a set range value.
5. The method of claim 4, wherein in step S3, the pulp feed concentration C1 is substituted into N-C1P as a variable to calculate the slag discharge concentration N of the first-stage high consistency cleaner, where P is the set slag discharge concentration ratio of the first-stage high consistency cleaner.
6. The method of claim 5, wherein the first-stage high consistency scummer has a reject consistency ratio of 1.2.
7. The method as claimed in claim 4, wherein in step S6, the pulp concentration of the second stage of high consistency cleaner is determined by C2-G/flow 2 as C2.
8. The method as claimed in claim 4, wherein in step S4, the slag discharge flow F of the first-stage high-consistency slag separator is determined by F ═ flow2-flow 1.
9. The pulp inlet concentration control method of the two-stage high concentration slag separator according to claim 4, wherein the step S7 further comprises:
comparing the pulp inlet concentration C2 with a set range, judging whether the pulp inlet concentration C2 is in the set range, and if the pulp inlet concentration C2 is higher than the set range value, controlling the water inlet flow1 and/or controlling the pulp outlet flow2 to increase; if the pulp inlet concentration C2 is lower than the set range value, controlling the water inlet flow1 and/or controlling the pulp outlet flow2 to be reduced; if the slurry inlet concentration C2 is within the set range, the operation is not performed.
10. Storage medium storing a computer program which, when executed by a processor, implements the method according to any one of claims 4-9.
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| CN109098027A (en) * | 2018-09-04 | 2018-12-28 | 马丽芬 | Two sections of continous way HC Cleaner devices of level-one |
| CN109281219A (en) * | 2018-11-24 | 2019-01-29 | 潜江市乐水林纸科技开发股份有限公司 | A kind of efficient heavy scummer |
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