CN116893117A - Device and method for detecting coarse pulp rate of papermaking-method reconstituted tobacco pulp - Google Patents
Device and method for detecting coarse pulp rate of papermaking-method reconstituted tobacco pulp Download PDFInfo
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 49
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 49
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- 238000012216 screening Methods 0.000 claims abstract description 80
- 238000001035 drying Methods 0.000 claims abstract description 68
- 238000005303 weighing Methods 0.000 claims abstract description 64
- 239000002002 slurry Substances 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 44
- 230000007246 mechanism Effects 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 12
- 239000004973 liquid crystal related substance Substances 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
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- 230000001681 protective effect Effects 0.000 claims description 6
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- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000010009 beating Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000004537 pulping Methods 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000007605 air drying Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
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- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
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- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
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- 239000012895 dilution Substances 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 230000004660 morphological change Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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Abstract
The invention discloses a device and a method for detecting the coarse pulp rate of papermaking reconstituted tobacco pulp, comprising a defibering tank, a screening chamber, a first centrifugal drying and weighing device, a second centrifugal drying and weighing device and a PLC control system, wherein a discharge hole of the defibering tank is connected with a feed inlet of the screening chamber; the invention realizes the full-process automatic and accurate detection of the thick liquid rate of the paper-making reconstituted tobacco slurry, shortens the detection time, directly reads the detection result after the detection of a single sample is finished, is convenient to operate, greatly reduces the labor intensity of detection personnel, and can be used for quickly monitoring the slurry performance in the paper-making reconstituted tobacco production process.
Description
Technical Field
The invention belongs to the technical field of reconstituted tobacco production, and particularly relates to a device and a method for detecting the coarse pulp rate of papermaking reconstituted tobacco pulp.
Technical Field
The pulping technology is a process of realizing a series of longitudinal and transverse morphological changes such as fluffing, cutting, wire separation and the like of insoluble matters under the action of mechanical force by means of pulping equipment, and finally forming pulp which can be manufactured by a paper machine. Due to the characteristics of tobacco raw materials, the pulping process of the reconstituted tobacco by the papermaking method mainly comprises material fluffing, cutting and crushing, the degree of thick and thin pulp is regulated and controlled by controlling the work of pulping equipment, and when the thick pulp rate of the reconstituted tobacco by the papermaking method is higher, the thickness, the bulk and the filling value of the product are relatively higher, and the absorbability is better.
In the actual production and research work of paper-making reconstituted tobacco, the wet weight index of the traditional paper-making industry is often adopted to judge the degree of thick and thin of the sizing agent, however, the components and fiber forms of tobacco raw materials are greatly different from those of traditional wood pulp, when the wet weight is measured, broken tobacco leaves are not easy to remain and hang on a metal frame, and tobacco stem fibers are very easy to run off along with water from the metal frame due to short, hard and irregular forms compared with soft and plastic wood pulp fibers, so that the accuracy of detection results is not high. Compared with the traditional wet weight index of the paper-making industry, the design of the square hole-shaped screen of the pall screening instrument is more suitable for detecting and judging the performance of the paper-making reconstituted tobacco pulp with coexistence of flaky, blocky and fibrous components, but the screening stage number of the device is 5, the device is not suitable for single-stage detection of the coarse pulp rate of the paper-making reconstituted tobacco pulp, the pulp of each stage after screening is separately collected after vacuum suction and dehydration, the vacuum suction force cannot be too high, otherwise, the filter paper on a sucker can be broken, the time consumption of vacuum suction is 40min or so, the collected pulp of each stage after screening is required to be transferred to a weighing box to be dried to constant weight, and finally the weighing calculation result is complex and complicated in the whole process, single sample detection time is at least about 6h, and is mostly manual operation, so that the labor intensity of detection personnel is high, and the device is not suitable for rapid measurement and evaluation of the performance of the paper-making reconstituted tobacco pulp.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and discloses a device and a method for detecting the thick liquid rate of paper-making reconstituted tobacco slurry, which realize full-process automatic and accurate detection of the thick liquid rate of paper-making reconstituted tobacco slurry, shorten the detection time, greatly reduce the labor intensity of detection personnel, and can be used for quickly monitoring the slurry performance in the paper-making reconstituted tobacco production process.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a papermaking method reconstituted tobacco thick liquids rate detection device, including the jar of fluffing, the screening room, first centrifugal stoving weighing device, second centrifugal stoving weighing device and switch board, the jar of fluffing and screening room all are equipped with feed inlet and water inlet, the water inlet of fluffing jar and screening room is equipped with first, the second inlet channel respectively, and be equipped with automatically regulated valve and electromagnetic flowmeter on first, be equipped with first agitator in the jar of fluffing respectively on the second inlet channel, the discharge gate of fluffing jar links to each other through the pipeline and the feed inlet of locating first bleeder valve and screening room on the pipeline, be equipped with stirring district and screening district in the screening district, separate through the baffle between stirring district and the screening district, be equipped with the second agitator in the stirring district, the bottom of stirring district is equipped with the pulp outlet, the screening district is equipped with sieve and sieve groove, the sieve is fixed in the sieve inslot, the four corners of baffle is fixed in on the sieve groove through the double-screw bolt, the upper portion of screening district lateral wall is equipped with the overflow mouth, the overflow mouth passes through the pipeline and links to each other with the import of first centrifugal stoving weighing device, the pulp outlet links to each other through pipeline and the second bleeder valve and second centrifugal stoving weighing device on the pipeline, the second bleeder valve links to each other through pipeline and the second automatic stoving weighing device on locating pipeline, the inlet valve and the PLC control valve, the PLC all links to each other.
Further, the first centrifugal drying weighing equipment and the second centrifugal drying weighing equipment are identical in structure, a screen chamber, a centrifugal drying chamber and a shell are sequentially arranged from inside to outside, the screen chamber is of an open top structure formed by screens, the screens of the screen chamber are connected with the centrifugal drying chamber through buckles, an insulating layer is arranged on the inner wall of the shell, a heating drying mechanism is arranged between the insulating layer and the centrifugal drying chamber, a liquid outlet is formed in the bottom of the shell, and weighing modules are respectively arranged on four supporting legs of the shell.
Further, the heating and drying mechanism is a heating wire, an infrared instrument or a microwave dryer, the screen is made of stainless steel, and the mesh number is 200-300 meshes.
Further, the centrifugal dewatering chamber comprises a cylindrical dewatering barrel, a filtering hole is formed in the dewatering barrel, a rotary table at the bottom of the dewatering barrel is connected with a motor shaft, the motor shaft is connected with a motor, a protective shell is arranged outside the motor shaft, and a liquid outlet is arranged at the bottom of the shell between the protective shell and the heat insulation layer.
Further, the feed inlet of the fluffing tank is funnel-shaped, and a concentration meter and a liquid level meter are arranged in the fluffing tank.
Further, a spraying mechanism is arranged at the top of the stirring area of the screening chamber, the spraying mechanism is connected with a third water inlet pipeline, a water inlet valve is arranged on the third water inlet pipeline, and the water inlet valve is connected with a PLC control system.
Further, the control cabinet is provided with a liquid crystal display, a switch key, an emergency stop key and a parameter setting key.
Further, the valve opening of the automatic regulating valve on the first water inlet pipeline and the second water inlet pipeline is controlled by a single loop taking the flow of the electromagnetic flowmeter as an input signal.
Further, the sieve plate is one of a 10 mesh, a 12 mesh, a 14 mesh, a 16 mesh and a 20 mesh quasi-sieve.
The method for detecting the coarse pulp rate of the papermaking-method reconstituted tobacco pulp by adopting the detection device comprises the following steps of:
(1) Before the reconstituted tobacco pulp of the papermaking method to be detected enters the defibering tank, adding water to the defibering tank until reaching a target liquid level, closing an automatic regulating valve on a first water inlet pipeline, stopping water inflow, adding the reconstituted tobacco pulp of the papermaking method to be detected into the defibering tank through a feed inlet, starting a first stirrer, opening a first discharge valve after the stirring time is reached, and enabling the pulp suspension in the defibering tank to enter a screening chamber;
(2) After the slurry suspension enters the screening chamber, a second stirrer of the screening chamber is started, screening timing is started, after the slurry suspension completely enters the screening chamber, the first stirrer stops running, an automatic regulating valve on a second water inlet pipeline is opened, a second electromagnetic flowmeter supplies water for the screening chamber at a set flow rate, the weight of the first centrifugal drying and weighing equipment is clear and zero, during screening, slurry passing through a screen plate flows into a screen chamber of the first centrifugal drying and weighing equipment through an overflow port on the right side wall of the screening chamber, and then the screen chamber and a centrifugal dewatering chamber run at a low speed of 1000r/min to prevent the slurry from overflowing;
(3) After screening timing is finished, an automatic regulating valve on a second water inlet pipeline is closed, a second stirrer stops running, the weight of a second centrifugal drying weighing device is clear to zero, a second discharge valve is opened, slurry in a screening chamber enters a screen chamber of the second centrifugal drying weighing device, a spraying mechanism of the screening chamber is opened after 15 seconds to flush residual slurry in the screening chamber, after flushing is finished, the first centrifugal drying weighing device and the second centrifugal drying weighing device run at a high speed of 4500r/min, centrifugal timing is started, after centrifugal timing is finished, a heating drying mechanism is started, real-time weight is continuously detected in a drying process, after the weight of the first centrifugal drying weighing device and the second centrifugal drying weighing device is constant, a sensor of a weighing module transmits the constant weight to a control system, the coarse slurry rate of a measured slurry sample is calculated, and a coarse slurry rate calculation result is displayed on a liquid crystal display screen of a control cabinet.
Further, the calculation formula of the target liquid level is as follows:
wherein:
L target object -fluffing tank target level,%
M Absolute dry Absolute dry weight of sample to be measured, g
M Air drying Air-dried weight of sample to be measured, g
C Target object Target concentration of sample to be measured after thinning, demodulation and concentration, wt%
ρ Water and its preparation method Density of water, g/cm 3
V Fluffing tank -volume after fluffing tank calibration, L
Further, the calculation formula of the brown stock rate is as follows:
wherein:
coarse pulp rate-coarse pulp rate of measured sample
m First one The weight g of the first centrifugal drying and weighing device after drying the constant weight
m Second one The weight g of the dried constant weight is measured by a second centrifugal drying and weighing device
The invention realizes the full-process automatic and accurate detection of the thick liquid rate of the paper-making reconstituted tobacco slurry, shortens the detection time, directly reads the detection result after the detection of a single sample is finished, is convenient to operate, greatly reduces the labor intensity of detection personnel, and can be used for quickly monitoring the slurry performance in the paper-making reconstituted tobacco production process.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view A-A of the screening chamber;
FIG. 3 is a schematic structural diagram of a control cabinet;
in the figure: 1. the system comprises a fluffing tank feed inlet 2, a fluffing tank 21, a first stirrer, 22, a concentration meter, 23, a liquid level meter, 31, a first automatic regulating valve, 32, a second automatic regulating valve, 41, a first electromagnetic flowmeter, 42, a second electromagnetic flowmeter, 5, a first discharge valve, 6, a water inlet valve, 7, a screening chamber, 71, a second stirrer, 72, a spraying mechanism, 73, a partition plate, 74, a sieve plate, 75, a pneumatic jacking mechanism, 76, an overflow port, 77, a slurry outlet, 78, a sieve plate groove, 8, a first centrifugal drying weighing device, 81, a sieve plate chamber, 811, a sieve plate, 82, a centrifugal dewatering chamber, 83, a shell, 84, a heating and drying mechanism, 85, an insulating layer, 86, a weighing module, 9, a second centrifugal drying weighing device, 10, a second discharge valve, 11, a liquid discharge port, 12, 121, a liquid crystal display screen, 122, a parameter setting key, 123, a switch key, 124 and an emergency stop key.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and examples.
Example 1
The utility model provides a paper-making process reconstituted tobacco thick liquids rate detection device, as shown in figures 1 through 3, including the fluffing jar 2, screening room 7, first centrifugal stoving weighing device 8, second centrifugal stoving weighing device 9 and switch board 12, fluffing jar 1 and screening room 2 all are equipped with feed inlet and water inlet, fluffing jar 2 and the water inlet of screening room 7 are equipped with first, second inlet channel respectively, and be equipped with first automatically regulated valve 31 and first electric magnetic flowmeter 41 on the first inlet channel, be equipped with second automatically regulated valve 32 and second electric magnetic flowmeter 42 on the second inlet channel, be equipped with first agitator 21 in fluffing jar 2, concentration meter 22 and level gauge 23, fluffing jar 2's discharge gate is through pipeline and the first discharge valve 5 of locating on the pipeline and the feed inlet of screening room 7 link to each other, be equipped with stirring district and screening district in the screening room 7, the stirring area and the screening area are separated by a partition 73, a second stirrer 71 is arranged in the stirring area, a slurry outlet 77 is arranged at the bottom of the stirring area, a screening area is provided with a screen plate 74 and a screen plate groove 78, the screen plate 74 is fixed in the screen plate groove 78 through a pneumatic jacking mechanism 75, four corners of the partition 73 are fixed on the screen plate groove 78 through studs, an overflow port 76 is arranged at the upper part of the side wall of the screening area, the overflow port 76 is connected with an inlet of a first centrifugal drying weighing device 8 through a pipeline, the slurry outlet 77 is connected with an inlet of a second centrifugal drying weighing device 9 through a pipeline and a second discharge valve 10 arranged on the pipeline, and the first automatic regulating valve 31, the first electromagnetic flowmeter 41, the second automatic regulating valve 32, the second electromagnetic flowmeter 42, the first discharge valve 5, the second discharge valve 10 and the control cabinet 12 are all connected with a PLC control system.
The first centrifugal drying weighing device 8 and the second centrifugal drying weighing device 9 are identical in structure, a screen chamber 81, a centrifugal drying chamber 82 and a shell 83 are sequentially arranged from inside to outside, the screen chamber 81 is of an open top structure formed by screens 811, the screens 811 of the screen chamber 81 are connected with the centrifugal drying chamber 82 through buckles, an insulating layer 85 is arranged on the inner wall of the shell, a heating drying mechanism 84 is arranged between the insulating layer 85 and the centrifugal drying chamber 82, a liquid outlet is arranged at the bottom of the shell 83, and weighing modules 86 are respectively arranged on four supporting legs of the shell 83. The heating and drying mechanism 84 is a heating wire, an infrared instrument or a microwave dryer, the screen 8111 is made of stainless steel, and the mesh number is 200 mesh.
The centrifugal dewatering chamber 82 comprises a cylindrical dewatering barrel, a filtering hole is formed in the dewatering barrel, a rotary table at the bottom of the dewatering barrel is connected with a motor shaft, the motor shaft is connected with a motor, a protective shell is arranged outside the motor shaft, and a liquid outlet is formed in the bottom of the shell between the protective shell and the heat preservation layer 85.
The feed inlet 1 of the fluffing tank 2 is funnel-shaped.
The top of the stirring area of the screening chamber 7 is provided with a spraying mechanism 72, the spraying mechanism 72 is connected with a third water inlet pipeline, a water inlet valve 6 is arranged on the third water inlet pipeline, and the water inlet valve 6 is connected with a PLC control system.
The control cabinet 12 is provided with a liquid crystal display 121, a parameter setting key 122, a switch key 123, and an emergency stop key 124.
The valve opening degree of the first automatic regulating valve 31 is controlled by a single circuit using the flow rate of the first electromagnetic flowmeter 41 as an input signal. The valve opening degree of the second automatic regulating valve 32 is controlled by a single circuit using the flow rate of the second electromagnetic flowmeter 42 as an input signal.
The fluffing tank 2 is a closed stainless steel tank body, the volume is 3-3.5L, a funnel-shaped feed inlet 1, a first vertical stirrer 21 and a water inlet are sequentially arranged on the upper end cover of the tank body from left to right, a liquid level meter 23 and a concentration meter 22 are arranged on the side face of the tank body, a first discharge valve 5 is arranged at the bottom of the tank body, and if the equipment investment cost is saved, the concentration meter can be not installed, and the concentration (0.5-1.0 wt%) of slurry in the tank body can be controlled by controlling the liquid level of the tank body. Before the slurry to be measured enters the defibering tank, the defibering tank is filled with water to a target liquid level (the target liquid level is calculated as shown in formula I), when the liquid level in the tank body reaches the target liquid level (the target liquid level is calculated as shown in formula I), the first automatic regulating valve 31 is closed, water inflow is stopped, the slurry to be measured is added into the defibering tank through the funnel-shaped feed inlet 1, the first vertical stirrer 21 is started, the first discharge valve 5 is opened after the stirring time is reached, and the slurry suspension in the defibering tank 2 enters the screening chamber 7.
The second agitator 71 of the screening chamber 7 is started, the screening time is started, the first agitator 21 stops operating after the slurry suspension has completely entered the screening chamber 7, the second automatic regulating valve 32 is opened, and the second electromagnetic flowmeter 42 supplies water to the screening chamber 7 at a set flow rate. The second agitator 71 right side is equipped with spraying mechanism 72, baffle 73 in proper order, and spraying mechanism 72 is used for the quick washing of screening room 7 when the thick liquids after the sieve are collected, and baffle 73 is used for preventing that thick liquids fibrous, slice, cubic etc. from passing screen 74 under the centrifugal force effect of second agitator 71 in the screening process, influences the testing result accuracy, and baffle 73 right side is equipped with screen 74 of certain mesh number, screen 74 installs in screen groove 78 to through pneumatic tight mechanism 75 (current equipment, including jack bolt, rubber tube and aerating device, after screen 74 installs in screen groove 78, adopts jack bolt jack screen 74, and the rubber tube is located the screen groove, and aerifys its jack screen to make its jack screen.
The baffle 73 is fixed through 4 solid bars with the length of 30mm which are vertically and horizontally symmetrically arranged, the solid bars are welded on one side, close to the second stirrer 71, of the vertical section of the sieve plate groove 78, the upper surface of the baffle 73 is 15-20mm higher than the highest point of the stirring paddles of the second stirrer 71, the lower surface of the baffle 73 is 10mm away from the bottom plate of the screening chamber 7, and the front end and the rear end of the horizontal direction of the baffle 73 are 30mm away from the inner wall of the screening chamber 7.
The number of the sieve plates 73 can be one of 10-mesh, 12-mesh, 14-mesh, 16-mesh and 20-mesh standard sieves according to the thickness of the reconstituted tobacco slurry by the papermaking method.
The first centrifugal drying weighing device 8 and the second centrifugal drying weighing device 9 are identical in structure, the first centrifugal drying weighing device 8 is taken as an example, a screen chamber 81, a centrifugal dewatering chamber 82 and a shell 83 are sequentially arranged from inside to outside, the screen chamber 81 is detachable, the screen 811 is made of stainless steel, the mesh number is 200, the screen chamber 81 is connected with the centrifugal dewatering chamber 82 through a buckle, an insulating layer 85 is arranged on the inner wall of the shell 83, a heating drying mechanism is arranged between the shell 83 and the centrifugal dewatering chamber 82, a liquid outlet is arranged at the bottom of the shell 83, and weighing modules 86 are respectively arranged on four supporting legs of the shell 83. At the beginning of screening timing, the weight of the first centrifugal drying and weighing device 8 is clear to be zero, and during screening, slurry passing through the screen plate 74 flows into the screen chamber 81 of the first centrifugal drying and weighing device 8 through the overflow port 76 on the right side wall of the screening chamber 7, and then the screen chamber 81 and the centrifugal dewatering chamber 82 run at a low speed of 1000r/min to prevent the slurry from overflowing. After screening timing is finished, the second automatic regulating valve 32 is closed, the second stirrer 71 stops running, the weight of the second centrifugal drying and weighing device 9 is clear to zero, the second discharge valve 10 is opened, slurry in the screening chamber 7 enters the screen chamber of the second centrifugal drying and weighing device 9, the spraying mechanism 72 of the screening chamber 7 is opened after 15s, residual slurry in the screening chamber 7 is washed, after washing is finished, the first centrifugal drying and weighing device and the second centrifugal drying and weighing device run at a high speed of 4500r/min, centrifugal timing is started, after centrifugal timing is finished, the heating and drying mechanism 84 is started, real-time weight is continuously detected in the drying process, after the weight of the first centrifugal drying and weighing device and the weight of the second centrifugal drying and weighing device are constant, the sensor of the weighing module transmits the weight after constant weight to the control system, the coarse slurry sample slurry rate is calculated (the coarse slurry rate is calculated to see formula II), the coarse slurry rate calculation result is displayed on the liquid crystal display screen 121 of the control cabinet 12, the control cabinet 12 is further provided with a switch button 123, an emergency button 124, a parameter setting button 122, and a parameter setting button 122 can be input to the parameters to be tested sample drying and air drying weight, the target drying and the concentration, the target concentration, the time and the time setting parameter setting parameters are displayed on the liquid crystal display screen 121.
When the method is used for detecting the coarse pulp rate of the reconstituted tobacco pulp by the papermaking method, the whole detection flow of fluffing dispersion, dilution and concentration adjustment, screening, collection after screening, centrifugal drying and weighing calculation is automatically carried out, and the detection result is directly read after the detection of a single sample is finished, so that the method is convenient to operate.
Equation one:
wherein:
L target object -fluffing tank target level,%
M Absolute dry -wait forMeasuring absolute dry weight of sample g
M Air drying Air-dried weight of sample to be measured, g
C Target object Target concentration of sample to be measured after thinning, demodulation and concentration, wt%
ρ Water and its preparation method Density of water, g/cm 3
V Fluffing tank -volume after fluffing tank calibration, L
Formula II:
wherein:
coarse pulp rate-coarse pulp rate of measured sample
m First one The weight g of the first centrifugal drying and weighing device after drying the constant weight
m Second one The weight g of the dried constant weight is measured by a second centrifugal drying and weighing device
Application example 1:
6 groups of post-beating pulp under different beating powers of the paper-making reconstituted tobacco are selected, the post-beating pulp sample coarse pulp rate is measured by the paper-making reconstituted tobacco pulp coarse pulp rate detection device, the mesh number of the sieve plate is 12 meshes, and the wet weight is detected as a comparison, and the result is shown in table 1.
Table 1 comparison of coarse pulp ratio and wet weight of pulp after beating of reconstituted tobacco by papermaking method at different beating powers
| Numbering device | Mill power (kW) | Coarse pulp yield (%) | Wet weight (g) |
| 1# | 130 | 12.72 | 2.71 |
| 2# | 125 | 14.45 | 3.10 |
| 3# | 120 | 17.10 | 3.36 |
| 4# | 115 | 22.52 | 3.32 |
| 5# | 110 | 28.31 | 3.67 |
| 6# | 105 | 32.14 | 3.92 |
As can be seen from Table 1, under different pulping powers, the difference of the coarse pulp rate indexes of the papermaking-method reconstituted tobacco pulp is obvious, and meanwhile, compared with the wet weight index, the coarse pulp rate index base number is obviously increased, so that the problem that the difference of the wet weight test numerical base number is too small and is not obvious enough is solved, and the method can be used as an evaluation index of the pulp performance in the pulping process.
Application example 2:
the method comprises the steps of selecting paper-making reconstituted tobacco after beating, measuring the coarse pulp rate of the same slurry sample by adopting the paper-making reconstituted tobacco slurry coarse pulp rate detection device, detecting the wet weight of the slurry sample as comparison, wherein the mesh number of a sieve plate is 10 mesh, 12 mesh, 14 mesh, 16 mesh and 20 mesh, and the result is shown in Table 2.
Table 2 comparison of slurry coarse pulp ratio and wet weight after beating of paper-making reconstituted tobacco with different screen mesh numbers
As can be seen from Table 2, the coarse pulp rate index of the paper-making reconstituted tobacco pulp is obviously larger than the wet weight index base number under different screen mesh numbers, and can be used as an evaluation index of the pulp performance in the pulping process.
Finally, it should be noted that: the above examples are provided for illustrating the technical solution of the present invention and are not to be construed as limiting the present invention, and it should be understood by those skilled in the art that any equivalent or obvious modification of the embodiments of the present invention without changing the performance or use thereof without departing from the spirit of the present invention is intended to be included in the scope of the present invention as claimed.
Claims (10)
1. The utility model provides a papermaking method reconstituted tobacco thick liquids rate detection device, a serial communication port, including the tank of untangling, the screening room, first centrifugal stoving weighing device, second centrifugal stoving weighing device and switch board, the tank of untangling and screening room all are equipped with feed inlet and water inlet, the water inlet of the tank of untangling and screening room is equipped with first, the second inlet channel respectively, and be equipped with automatic regulating valve and electromagnetic flowmeter on first, be equipped with first agitator in the second inlet channel respectively, the discharge gate of the tank of untangling links to each other through the pipeline and the feed inlet of locating first bleeder valve and screening room on the pipeline, be equipped with stirring district and screening district in the screening district, separate through the baffle between stirring district and the screening district, be equipped with the second agitator in the stirring district, the bottom of stirring district is equipped with the pulp outlet, the screening district is equipped with sieve and sieve groove, the sieve is fixed in the sieve inslot, the four corners of baffle is fixed in the sieve groove through the double-screw bolt, the upper portion of screening district lateral wall is equipped with the overflow mouth, the overflow mouth links to each other through the import of pipeline and first centrifugal weighing device, the pulp outlet links to each other through pipeline and the second bleeder valve and second bleeder valve on the pipeline, the second bleeder valve and the electromagnetic valve all links to each other, the PLC control valve.
2. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 1, wherein the first centrifugal drying weighing equipment and the second centrifugal drying weighing equipment have the same structure, a screen chamber, a centrifugal dewatering chamber and a shell are sequentially arranged from inside to outside, the screen chamber is of a top open structure formed by screens, the screens of the screen chamber are connected with the centrifugal dewatering chamber through buckles, an insulating layer is arranged on the inner wall of the shell, a heating drying mechanism is arranged between the insulating layer and the centrifugal dewatering chamber, a liquid outlet is arranged at the bottom of the shell, and weighing modules are respectively arranged on four supporting legs of the shell.
3. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 2, wherein the heating and drying mechanism is a heating wire, an infrared instrument or a microwave dryer, and the mesh number of the screen is 200-300 meshes.
4. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 2, wherein the centrifugal dewatering chamber comprises a cylindrical dewatering barrel, a filtering hole is formed in the dewatering barrel, a rotary table at the bottom of the dewatering barrel is connected with a motor shaft, the motor shaft is connected with a motor, a protective shell is arranged outside the motor shaft, and a liquid outlet is formed in the bottom of the shell between the protective shell and the heat-insulating layer.
5. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 1, wherein a feed inlet of the fluffing tank is funnel-shaped, and a concentration meter and a liquid level meter are arranged in the fluffing tank.
6. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 1, wherein a spraying mechanism is arranged at the top of the stirring area of the screening chamber, the spraying mechanism is connected with a third water inlet pipeline, a water inlet valve is arranged on the third water inlet pipeline, and the water inlet valve is connected with a PLC control system.
7. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 1, wherein the control cabinet is provided with a liquid crystal display, a switch key, an scram key and a parameter setting key.
8. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 1, wherein the valve opening of the automatic regulating valve on the first water inlet pipeline and the second water inlet pipeline is controlled by a single loop taking the flow size of an electromagnetic flowmeter as an input signal.
9. The device for detecting the coarse pulp rate of the papermaking-process reconstituted tobacco pulp according to claim 1, wherein the screen plate is one of a 10-mesh, 12-mesh, 14-mesh, 16-mesh and 20-mesh standard screen.
10. A method for detecting the coarse pulp rate of paper-making reconstituted tobacco pulp by adopting the detection device as claimed in any one of claims 1 to 9, which is characterized by comprising the following steps:
(1) Before the reconstituted tobacco pulp of the papermaking method to be detected enters the defibering tank, adding water to the defibering tank until reaching a target liquid level, closing an automatic regulating valve on a first water inlet pipeline, stopping water inflow, adding the reconstituted tobacco pulp of the papermaking method to be detected into the defibering tank through a feed inlet, starting a first stirrer, opening a first discharge valve after the stirring time is reached, and enabling the pulp suspension in the defibering tank to enter a screening chamber;
(2) After the slurry suspension enters the screening chamber, a second stirrer of the screening chamber is started, screening timing is started, after the slurry suspension completely enters the screening chamber, the first stirrer stops running, an automatic regulating valve on a second water inlet pipeline is opened, a second electromagnetic flowmeter supplies water for the screening chamber at a set flow rate, the weight of the first centrifugal drying and weighing equipment is clear and zero, during screening, slurry passing through a screen plate flows into a screen chamber of the first centrifugal drying and weighing equipment through an overflow port on the right side wall of the screening chamber, and then the screen chamber and a centrifugal dewatering chamber run at a low speed of 1000r/min to prevent the slurry from overflowing;
(3) After screening timing is finished, an automatic regulating valve on a second water inlet pipeline is closed, a second stirrer stops running, the weight of a second centrifugal drying weighing device is clear to zero, a second discharge valve is opened, slurry in a screening chamber enters a screen chamber of the second centrifugal drying weighing device, a spraying mechanism of the screening chamber is opened after 15 seconds to flush residual slurry in the screening chamber, after flushing is finished, the first centrifugal drying weighing device and the second centrifugal drying weighing device run at a high speed of 4500r/min, centrifugal timing is started, after centrifugal timing is finished, a heating drying mechanism is started, real-time weight is continuously detected in a drying process, after the weight of the first centrifugal drying weighing device and the second centrifugal drying weighing device is constant, a sensor of a weighing module transmits the constant weight to a control system, the coarse slurry rate of a measured slurry sample is calculated, and a coarse slurry rate calculation result is displayed on a liquid crystal display screen of a control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310739716.2A CN116893117A (en) | 2023-06-21 | 2023-06-21 | Device and method for detecting coarse pulp rate of papermaking-method reconstituted tobacco pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310739716.2A CN116893117A (en) | 2023-06-21 | 2023-06-21 | Device and method for detecting coarse pulp rate of papermaking-method reconstituted tobacco pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116893117A true CN116893117A (en) | 2023-10-17 |
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ID=88311452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310739716.2A Pending CN116893117A (en) | 2023-06-21 | 2023-06-21 | Device and method for detecting coarse pulp rate of papermaking-method reconstituted tobacco pulp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116893117A (en) |
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2023
- 2023-06-21 CN CN202310739716.2A patent/CN116893117A/en active Pending
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