CN111304948A - High-pressure continuous horizontal pipe cooking pulping device - Google Patents
High-pressure continuous horizontal pipe cooking pulping device Download PDFInfo
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- CN111304948A CN111304948A CN202010178677.XA CN202010178677A CN111304948A CN 111304948 A CN111304948 A CN 111304948A CN 202010178677 A CN202010178677 A CN 202010178677A CN 111304948 A CN111304948 A CN 111304948A
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- 238000010411 cooking Methods 0.000 title claims abstract description 189
- 238000004537 pulping Methods 0.000 title claims abstract description 37
- 238000003860 storage Methods 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 238000000227 grinding Methods 0.000 claims abstract description 58
- 238000005191 phase separation Methods 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims description 83
- 238000001816 cooling Methods 0.000 claims description 24
- 238000007599 discharging Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 33
- 239000000835 fiber Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 101
- 238000005507 spraying Methods 0.000 description 29
- 238000000034 method Methods 0.000 description 14
- 238000003825 pressing Methods 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000004064 recycling Methods 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 2
- 238000011085 pressure filtration Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/06—Feeding devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/08—Discharge devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/10—Heating devices
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
- D21C7/12—Devices for regulating or controlling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention relates to the technical field of pulping equipment, and discloses a high-pressure continuous horizontal pipe cooking pulping device which comprises a feeding mechanism, a cooking mechanism, a solid-liquid-gas three-phase separation mechanism, a liquid adding device and a gas pressurizing mechanism, wherein the feeding mechanism comprises a storage bin and a conveying device, the cooking mechanism comprises at least one cooking device, the cooking device comprises a cooking pipe, a spiral conveying device and a grinding disc device are arranged in the cooking pipe, the storage bin conveys pulp into the cooking pipe through the conveying device, and the liquid adding device conveys cooking liquid into the cooking pipe in a pressurizing manner; the high-pressure continuous transverse pipe cooking pulping device provided by the invention is produced in a totally-enclosed manner, is energy-saving and environment-friendly, has low energy consumption and high efficiency, and solves the problems of low production efficiency, too short fiber and poor quality of the traditional pulping.
Description
Technical Field
The invention relates to the technical field of pulping equipment, in particular to a high-pressure continuous horizontal pipe cooking pulping device.
Background
Pulp is generally prepared by cooking raw materials with high fiber content such as wood, grass and the like through a pulping device, so that the pulp and cooking liquor have chemical action, and then cellulose in the pulp is obtained, because of the limitation of the reaction condition of the traditional cooking liquor, the pulping device only operates under normal pressure or low pressure (below 1.2 MPa), and the used cooking liquor is the cooking liquor which is not friendly to the environment or human body such as sulfate, caustic soda, ammonia water and the like, so that the problem of environmental pollution caused by three wastes such as waste water, waste gas, waste liquid and the like exists; in addition, the digester is adopted, and the next process can be carried out only after pressure relief is finished due to internal and external pressure difference in high-pressure production, so that production cannot be continuous, and energy loss and low efficiency are caused by intermittent cooking; the whole pulping equipment has high cost, large volume, complex structure, unclosed production process, low energy efficiency or efficiency and unreliable long-time use.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-pressure continuous transverse pipe cooking pulping device which is produced in a totally-enclosed manner, is energy-saving and environment-friendly, has low energy consumption and high efficiency, and solves the problems of low production efficiency, short fiber and poor quality of the traditional pulping.
The technical scheme adopted by the invention is as follows:
a high-pressure continuous horizontal pipe cooking pulping device comprises a feeding mechanism, a cooking mechanism, a solid-liquid-gas three-phase separation mechanism, a liquid adding device and a gas pressurizing mechanism, wherein the feeding mechanism comprises a storage bin and a conveying device, the cooking mechanism comprises at least one cooking device, the cooking device comprises a cooking pipe, a spiral conveying device and a grinding disc device are arranged in the cooking pipe, the storage bin conveys pulp into the cooking pipe through the conveying device, and the liquid adding device conveys cooking liquid into the cooking pipe in a pressurizing manner;
the solid-liquid-gas three-phase separation mechanism comprises a slurry storage bin, a blowing bin, a liquid collecting box, a gas collecting chamber and a slurry decanting pool, slurry in the cooking tube is output to the slurry storage bin, the slurry storage bin is connected with the blowing bin, a pressure filter is arranged in the blowing bin, the blowing bin comprises a liquid discharge port, a gas exhaust port and a slurry discharge port, the liquid discharge port, the gas exhaust port and the slurry discharge port are respectively connected with the liquid collecting box, the gas collecting chamber and the slurry decanting pool through pipelines, an air extractor is arranged between the blowing bin and the gas collecting chamber, a return pipeline is arranged between the liquid collecting box and the slurry storage bin, and a return pipeline is arranged between the gas collecting chamber and the slurry storage bin;
the gas pressurizing mechanism comprises a first gas pressurizing device for pressurizing the storage bin and the blowing bin and a second gas pressurizing device for pressurizing the digester.
In the technical scheme, two or more storage bins are preferably selected for alternative use, so that the continuity of feeding is realized, specifically, materials and liquid are fed into one storage bin firstly in production, a feeding valve of the storage bin is closed after the materials and the liquid are fully stored, the storage bin is heated to a certain temperature, gas is fed into a storage bin pump through a first gas pressurizing device and is pressurized continuously at 2-6 MPa, gas is fed into a blowing bin pump through the first gas pressurizing device and is pressurized at 2-6 MPa, gas is fed into a digester pump through a second gas pressurizing device and is pressurized at 2-6 MPa, then a discharging valve at the lower part of the storage bin is opened, the storage bin conveys pulp into a cooking tube through a conveying device, cooking liquid is pumped into the cooking tube through a liquid feeding device, and the cooking tube starts to be heated for cooking. The pulping device adopts a production mode of sealed pressure maintaining of the whole production line, namely sealed pressure maintaining is carried out in a feeding link, a cooking link and a solid-liquid-gas three-phase separation link, the whole production process is continuously carried out in a high-pressure state, intermittent pressure relief operation is not needed, and the working efficiency is improved.
The feeding mechanism conveys the pulp to the cooking mechanism for high-temperature and high-pressure cooking reaction, and the spiral conveying device and the grinding disc device are arranged in the cooking pipe, so that the spiral conveying device can uniformly stir and convey the pulp in the cooking process of the pulp, and the reaction efficiency is improved; the spiral conveying device continuously conveys the slurry to the grinding disc device, the grinding disc device realizes fine grinding of the slurry, the slurry finely ground by the grinding disc device is output from a discharge port of the cooking pipe, the number of the cooking devices can be adjusted according to materials and purposes, multiple stages can be adopted, when three-stage cooking is adopted, cooking is carried out in the one-stage cooking device, the slurry after primary grinding enters the second-stage cooking device for cooking and after fine grinding, the slurry enters the third-stage cooking device for repeating the steps, and the slurry after three-stage cooking is continuously discharged into the solid-liquid-gas three-phase separation mechanism.
The solid-liquid-gas three-phase separation mechanism comprises a slurry storage bin, a spraying bin, a liquid collecting box, a gas collecting chamber and a slurry decanting tank, wherein after the cooked slurry is continuously discharged into the slurry storage bin, intermittent discharging is carried out by opening a valve between the slurry storage bin and the spraying bin, pressure difference between the slurry storage bin and the spraying bin is utilized, meanwhile, pressure filtration is carried out in the spraying bin to realize solid-liquid-gas three-phase separation, gas is discharged into the gas collecting chamber for recycling after separation, liquid is pumped into the liquid collecting box for filtering, then is pumped into the slurry storage bin again for recycling, and the slurry is conveyed to the slurry decanting tank.
In the process of intermittently discharging materials by operating a valve between a slurry storage bin and a discharge bin, the pressure of the discharge bin needs to be gradually reduced by an air pump after the discharge valve of the slurry storage bin is closed, and the disturbance of pressure leakage to a system during discharging is reduced by pressure difference filter pressing, so that the stable production of the system is ensured.
In addition, when the air pressure in the spraying and placing bin is close to the normal pressure, the slurry is discharged, the valve is closed after the slurry enters the standing tank, and the first gas pressurizing device pressurizes the spraying and placing bin and then enters the next spraying and placing process.
In conclusion, the pulping device adopts a multi-stage digester for continuous cooking, adopts the integrated design of cooking, stirring and pulping, can ensure continuous operation of three-phase separation work of cooking, stirring, pulping and solid-liquid-gas in high-pressure production, discharges intermittent material, realizes closed production in the whole process, recycles the solid phase, the liquid phase and the gas phase, saves energy, protects environment, and ensures pollution-free and environment-friendly cooking production.
Further, the storage bin comprises two feeding bins, the feeding bins are provided with liquid inlets, feeding ports and discharging ports, the conveying device is a spiral conveying pipe, and slurry in the feeding bins is conveyed into the cooking pipe through the spiral conveying pipe after being output from the discharging ports.
Specifically, the spiral conveying pipe is provided with two feeding holes, and the two feed openings are respectively connected with the corresponding feeding holes.
In the production process, the two feeding bins intermittently feed in turn, the feeding port is closed after one feeding bin feeds, the feeding port is opened again for feeding in the other feeding bin, and the two feeding bins intermittently feed in turn, so that the continuous production is ensured, and the production efficiency is improved.
Further, screw conveyer includes auger delivery axle and motor, the mill device includes interior mill and outer mill, interior mill is the end of column and the coaxial setting of this interior mill at the auger delivery axle, the annular structure in the mill outside including outer mill is coaxial setting, leave the mill clearance between the lateral wall of interior mill and the inside wall of outer mill, and be equipped with forward screw 27 and reverse screw 28 on the lateral wall of interior mill and the inside wall of outer mill respectively, the one end in mill clearance is the feed end, and the other end is the discharge end, the feed end is just to the direction of delivery of the intraductal thick liquids of cooking, discharge end and the discharge gate intercommunication on the pipe of cooking.
It should be noted that the inner grinding disc is coaxially arranged at the tail end of the spiral conveying shaft, the inner grinding disc rotates along with the rotation of the spiral conveying shaft, that is, one driving device can simultaneously drive the spiral conveying shaft and the inner grinding disc, the outer grinding disc and the cooking pipe are designed into a whole, that is, the reverse screw thread 28 is arranged on the inner wall of the cooking pipe close to the discharge port, and in order to prolong the service life of the grinding disc device, the forward screw thread 27 on the inner grinding disc and the reverse screw thread 28 on the inner wall of the cooking pipe are both subjected to chromium plating hardening.
Further, in order to better realize the fine grinding of the pulp, the grinding disc gap is gradually reduced along the conveying direction of the pulp in the cooking tube.
Further, in order to better realize the fine grinding of the pulp, the diameter of the inner grinding disc is gradually increased along the conveying direction of the pulp in the cooking tube.
Furthermore, a heater and a cooling jacket are arranged on the cooking pipe. To help cool the abrasive disc device, the cooling jacket extends in length to align with the discharge end of the abrasive disc device.
Specifically, the heater is arranged in the cooking pipe along the length direction of the cooking pipe, the cooling jacket is arranged outside the cooking pipe along the length direction of the heater, the heater and the cooling jacket can be arranged to heat the cooking device, the temperature control function is achieved, and the temperature is controlled by the cooling jacket after the heater is started to heat to a certain temperature.
Furthermore, a power bin is arranged in the position, close to the feeding hole of the cooking pipe, in the cooking pipe, the motor is arranged in the power bin, the motor drives the spiral conveying shaft to rotate, the power bin is a sealed space and is filled with inert protective gas, and the inert protective gas ensures the safety of the operation of the motor.
Further, in order to reduce the problem that the traditional mechanical seal is expensive, a third gas pressurizing device for pressurizing the power bin is further included. The pressure in the power bin and the pressure of the cooking pipe are kept balanced, and the normal operation of the motor can be ensured without expensive mechanical seal.
Furthermore, an oil cooling radiating pipe for radiating the motor is arranged in the power bin.
Furthermore, the first gas pressurizing device, the second gas pressurizing device and the third gas pressurizing device respectively comprise a gas transmission pipeline and a gas pressurizing pump, and the liquid adding device comprises a liquid adding pipeline and a liquid pressurizing pump.
The invention has the beneficial effects that: in the technical scheme, materials and liquid are firstly fed into a storage bin in production, a feeding valve of the storage bin is closed after the storage bin is full of the materials and is heated to a certain temperature, gas is fed into a storage bin pump through a first gas pressurizing device and is pressurized continuously at 2-6 MPa, gas is fed into a spraying and discharging bin pump through the first gas pressurizing device and is pressurized at 2-6 MPa, gas is fed into a digester pump through a second gas pressurizing device and is pressurized at 2-6 MPa, a discharging valve at the lower part of the storage bin is opened, the storage bin conveys slurry into a cooking tube through a conveying device, cooking liquid is pumped into the cooking tube through a liquid feeding device, and the cooking tube starts to be heated for cooking. The pulping device adopts a production mode of sealed pressure maintaining of the whole production line, namely sealed pressure maintaining is carried out in a feeding link, a cooking link and a solid-liquid-gas three-phase separation link, feeding and spraying are intermittent in the whole production, the cooking continuity is guaranteed through the dynamic balance of system pressure maintaining, the process is continuously carried out in a high-pressure state, intermittent heating and cooling, boosting and pressure relieving operations are not needed, and the working efficiency is improved.
The feeding mechanism conveys the pulp to the cooking mechanism for high-temperature and high-pressure cooking reaction, and the spiral conveying device and the grinding disc device are arranged in the cooking pipe, so that the spiral conveying device can uniformly stir and convey the pulp in the cooking process of the pulp, and the reaction efficiency is improved; the spiral conveying device continuously conveys the slurry to the grinding disc device, the grinding disc device realizes fine grinding of the slurry, the slurry finely ground by the grinding disc device is output from a discharge port of the cooking pipe, the number of the cooking devices can be adjusted according to materials and purposes, multiple stages can be adopted, when three-stage cooking is adopted, cooking is carried out in the one-stage cooking device, the slurry after primary grinding enters the second-stage cooking device for cooking and after fine grinding, the slurry enters the third-stage cooking device for repeating the steps, and the slurry after three-stage cooking is continuously discharged into the solid-liquid-gas three-phase separation mechanism.
The solid-liquid-gas three-phase separation mechanism comprises a slurry storage bin, a spraying bin, a liquid collecting box, a gas collecting chamber and a slurry decanting tank, wherein after the cooked slurry is continuously discharged into the slurry storage bin, intermittent discharging is carried out by opening a valve between the slurry storage bin and the spraying bin, pressure difference between the slurry storage bin and the spraying bin is utilized, meanwhile, pressure filtration is carried out in the spraying bin to realize solid-liquid-gas three-phase separation, gas is discharged into the gas collecting chamber for recycling after separation, liquid is pumped into the liquid collecting box for filtering, then is pumped into the slurry storage bin again for recycling, and the slurry is conveyed to the slurry decanting tank.
It should be noted that, in the process of intermittently discharging by operating the valve between the slurry storage bin and the discharge bin, only a slight pressure difference between the slurry storage bin and the discharge bin needs to be ensured when the slurry enters the discharge bin from the slurry storage bin, and the discharge is realized by a certain pressure difference.
In addition, in the process of filter pressing the slurry in the spraying bin, a valve of the slurry storage bin needs to be ensured to be closed, so that the slurry spraying is intermittent; certainly, after the filter pressing is finished, the first gas pressurizing device pressurizes the spraying and placing bin, the pressure is increased to be close to the pressure of the pulp storage bin, then the next round of pulp spraying is carried out, the power mechanical part of the filter pressing device is omitted through the operation of air pressure, the cost is reduced, and the reliability of the system is improved.
In conclusion, the pulping device adopts a multi-stage digester for continuous cooking, adopts the integrated design of cooking, stirring and pulping, can ensure continuous operation of three-phase separation work of cooking, stirring, pulping and solid-liquid-gas in high-pressure production, discharges intermittent material, realizes closed production in the whole process, recycles the solid phase, the liquid phase and the gas phase, saves energy, protects environment, and ensures pollution-free and environment-friendly cooking production.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a middle cooker of the present invention;
fig. 3 is a partially enlarged view of fig. 2.
In the figure: a storage bin 1; a feeding bin 1.1; a digester 2; a cooking tube 3; a pulp storage bin 4; a spraying bin 5; a liquid collecting tank 6; a gas collection chamber 7; a soybean milk sedimentation tank 8; a pressure filter 9; an air extractor 10; a return line 11; a return gas line 12; a gas transmission line 13; a gas pressure pump 14; a liquid feeding line 15; a liquid pressure pump 16; a spiral delivery pipe 17; a screw conveying shaft 18; a motor 19; an inner grinding disc 20; the disc gap 21; a heater 22; a cooling jacket 23; a power bin 24; an oil-cooled radiating pipe 25; a discharge port 26; a positive thread 27; the reverse threads 28.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
as shown in fig. 1-3, the present embodiment provides a high-pressure continuous horizontal tube cooking and pulping device, which includes a feeding mechanism, a cooking mechanism, a solid-liquid-gas three-phase separation mechanism, a liquid adding device, and a gas pressurization mechanism, where the feeding mechanism includes a storage bin 1 and a conveying device, the cooking mechanism includes at least one cooking device 2, the present embodiment is provided with three cooking devices 2, the cooking device 2 includes a cooking tube 3, a spiral conveying device and a millstone device are arranged in the cooking tube 3, the storage bin 1 conveys pulp into the cooking tube 3 through the conveying device, and the liquid adding device conveys cooking liquid into the cooking tube 3 under pressure;
the solid-liquid-gas three-phase separation mechanism comprises a pulp storage bin 4, a spraying bin 5, a liquid collecting box 6, a gas collecting chamber 7 and a plasma decanting tank 8, the pulp in the cooking pipe 3 is output to the pulp storage bin 4, the pulp storage bin 4 is connected with the spraying bin 5, a filter press 9 is arranged in the spraying bin 5, the spraying bin 5 comprises a liquid discharge port, a gas discharge port and a pulp discharge port, the liquid discharge port, the gas discharge port and the pulp discharge port are respectively connected with the liquid collecting box 6, the gas collecting chamber 7 and the plasma decanting tank 8 through pipelines, an air pump 10 is arranged between the spraying bin 5 and the gas collecting chamber 7, a return pipeline 11 is arranged between the liquid collecting box 6 and the storage bin 1, and a return pipeline 12 is arranged between the gas collecting chamber 7 and the;
the gas pressurizing mechanism comprises a first gas pressurizing device for pressurizing the storage bin 1 and the blowing bin 5 and a second gas pressurizing device for pressurizing the digester 2.
The first gas pressurizing device and the second gas pressurizing device both comprise a gas pipeline 13 and a gas pressurizing pump 14, and the liquid adding device comprises a liquid adding pipeline 15 and a liquid pressurizing pump 16.
In the production of the technical scheme, materials and liquid are firstly fed into a storage bin 1, a feeding valve of the storage bin 1 is closed after the materials and the liquid are fully stored, the storage bin 1 is heated to a certain temperature, gas is pumped into the storage bin 1 through a first gas pressurizing device and is pressurized continuously for 2MPa-6MPa, gas is pumped into a blowing bin 5 through a first gas pressurizing device and is pressurized for 2MPa-6MPa, gas is pumped into a digester 2 through a second gas pressurizing device and is pressurized for 2MPa-6MPa, a discharging valve at the lower part of the storage bin 1 is opened, the storage bin 1 conveys the slurry into a cooking pipe 3 through a conveying device, cooking liquid is pumped into the cooking pipe 3 through a liquid feeding device, the cooking liquid is preferably selected from alkaline potassium-containing compounds, and the cooking pipe 3 starts to be heated for cooking. The pulping device adopts a production mode of sealed pressure maintaining of the whole production line, namely sealed pressure maintaining is carried out in a feeding link, a cooking link and a solid-liquid-gas three-phase separation link, the whole production process is continuously carried out in a high-pressure state, intermittent pressure relief operation is not needed, and the working efficiency is improved.
The feeding mechanism conveys the pulp to the cooking mechanism for high-temperature and high-pressure cooking reaction, and because the spiral conveying device and the millstone device are arranged in the cooking pipe 3, the spiral conveying device realizes uniform stirring and conveying of the pulp in the cooking process of the pulp, so that the reaction efficiency is improved; the spiral conveying device continuously conveys the pulp to the grinding disc device, the grinding disc device realizes fine grinding of the pulp, the pulp finely ground by the grinding disc device is output from a discharge port 26 of the cooking pipe 3, the number of the cooking devices 2 can be adjusted according to materials and purposes, multiple stages can be adopted, when three-stage cooking is adopted, cooking is carried out in the first-stage cooking device 2, the pulp after primary grinding enters the second-stage cooking device 2 for cooking and after fine grinding, the pulp enters the third-stage cooking device 2 for repeating the steps, and the pulp after three-stage cooking is continuously discharged into the solid-liquid-gas three-phase separation mechanism.
The solid-liquid-gas three-phase separation mechanism comprises a slurry storage bin 4, a spraying bin 5, a liquid collecting box 6, a gas collecting chamber 7 and a slurry decanting tank 8, wherein after the cooked slurry is continuously discharged into the slurry storage bin 4, intermittent discharging is carried out by opening a valve between the slurry storage bin 4 and the spraying bin 5, pressure difference between the slurry storage bin 1 and the spraying bin 5 is utilized, meanwhile, filter pressing is carried out in the spraying bin 5 to realize solid-liquid-gas three-phase separation, gas is discharged into the gas collecting chamber 7 after separation for recycling, the liquid is pumped into the liquid collecting box 6 for filtering and then is pumped into the slurry storage bin 1 again for recycling, and the slurry is conveyed to the slurry decanting tank 8.
It should be noted that, in the process of intermittently discharging by operating the valve between the slurry storage bin 4 and the blow-off bin 5, the discharge can be realized only by ensuring a certain pressure difference between the slurry storage bin 4 and the blow-off bin 5, that is, the purpose of pressurizing the blow-off bin 5 by the first gas pressurizing device is to reduce the pressure difference between the slurry storage bin 4 and the blow-off bin 5, reduce the disturbance of pressure leakage to the system during discharging, and ensure the stable production of the system.
In addition, in the process of filter pressing the slurry in the spraying bin 5, the air extractor 10 realizes air extraction in the spraying bin 5 while the filter press 9 is started, and the filter pressing efficiency can be improved through pressure difference; certainly, after the filter pressing is finished, the first gas pressurizing device pressurizes the discharge bin 5, the slurry can fall off from the filter pressing net, the fallen slurry smoothly enters the slurry standing tank 8, and the gas pressurizing and tail gas discharging of the discharge bin 5 have a cooperative operation function.
In conclusion, the pulping device adopts the multi-stage digester 2 to perform continuous cooking, adopts the integrated design of cooking, stirring and pulping, can ensure continuous operation of three-phase separation work of cooking, stirring, pulping and solid-liquid-gas in high-pressure production, discharges intermittently, performs closed production in the whole process, recycles the solid phase, the liquid phase and the gas phase, saves energy, protects the environment, and ensures pollution-free and environment-friendly cooking production.
Example 2:
this embodiment is optimized based on embodiment 1 described above.
Storage silo 1 includes two feeding storehouse 1.1, and feeding storehouse 1.1 all is equipped with inlet, material loading mouth and feed opening, and the inlet is convenient for feeding storehouse fluid infusion, and conveyor is helical conveyer pipe 17, and the thick liquids in feeding storehouse 1.1 are carried to boiling tube 3 in through helical conveyer pipe 17 after the feed opening output.
Specifically, the spiral conveying pipe 17 has two feed inlets, and the two feed outlets are connected to the corresponding feed inlets respectively.
In the production process, the two feeding bins 1.1 feed intermittently in turn, the feeding port is closed to start production after the feeding of one feeding bin 1.1, the feeding port is opened to feed in the other feeding bin 1.1, and the two feeding bins 1.1 feed intermittently in turn, so that the continuous production is ensured, and the production efficiency is improved.
Example 3:
this embodiment is optimized based on embodiment 1 described above.
Screw conveyer includes auger delivery axle 18 and motor 19, the mill device includes interior mill 20 and outer mill, interior mill 20 is the end at auger delivery axle 18 of column and the coaxial setting of this interior mill 20, the annular structure in the interior mill 20 outside for coaxial setting of outer mill, leave mill clearance 21 between the lateral wall of interior mill 20 and the inside wall of outer mill, and be equipped with forward screw 27 and reverse screw 28 on the lateral wall of interior mill 20 and the inside wall of outer mill respectively, the one end in mill clearance 21 is the feed end, the other end is the discharge end, the feed end is just to the direction of delivery of thick liquids in the pipe 3 of cooking, discharge end and the discharge gate 26 intercommunication on the pipe 3 of cooking.
It should be noted that the inner grinding disc 20 is coaxially disposed at the end of the spiral conveying shaft 18, the inner grinding disc 20 rotates along with the rotation of the spiral conveying shaft 18, that is, one driving device can simultaneously drive the spiral conveying shaft 18 and the inner grinding disc 20, the outer grinding disc and the cooking tube 3 are designed as an integral body, that is, the reverse thread 28 is disposed on the inner wall of the cooking tube 3 near the discharge port 26, and in order to improve the service life of the grinding disc device, the forward thread 27 on the inner grinding disc 20 and the reverse thread 28 on the inner wall of the cooking tube 3 are both subjected to chrome plating hardening.
Example 4:
this embodiment is optimized based on embodiment 3 described above.
In order to achieve fine grinding of the pulp, the grinding disc gap 21 is gradually reduced along with the conveying direction of the pulp in the cooking tube 3, and specifically, in the embodiment, the diameter of the inner grinding disc 20 is gradually increased along with the conveying direction of the pulp in the cooking tube 3.
Example 5:
this embodiment is optimized based on embodiment 1 described above.
The cooking tube 3 is provided with a heater 22 and a cooling jacket 23. To help cool down the grinding disc arrangement, the length of the cooling jacket 23 extends to be aligned with the discharge end of the grinding disc arrangement.
Specifically, the heater 22 is arranged in the cooking pipe 3 along the length direction of the cooking pipe 3, the cooling jacket 23 is arranged outside the cooking pipe 3 along the length direction of the heater 22, the heater 22 and the cooling jacket 23 are arranged to heat the cooking device 2, and meanwhile, the temperature control function is achieved, and the temperature is controlled by the cooling jacket 23 after the heater 22 is started to heat to a certain temperature.
Example 6:
this embodiment is optimized based on embodiment 3 described above.
A power bin 24 is arranged in the position, close to a feeding hole of the cooking pipe 3, in the cooking pipe 3, a motor 19 is arranged in the power bin 24, the motor 19 drives the spiral conveying shaft 18 to rotate, the power bin 24 is a sealed space, and inert protective gas is filled in the power bin 24 and ensures the safety of the operation of the motor 19.
In order to reduce the problem that the traditional mechanical seal is expensive, a third gas pressurizing device for pressurizing the power bin 24 is further included, and the third gas pressurizing device comprises a gas pipeline 13 and a gas pressurizing pump 14. The pressure in the power bin 24 is kept balanced with the pressure in the cooking tube 3, and the normal operation of the motor 19 can be ensured without expensive mechanical sealing.
Example 7:
this embodiment is optimized based on embodiment 6 described above.
An oil cooling radiating pipe 25 for radiating heat of the motor 19 is arranged in the power bin 24, and the oil cooling radiating pipe 25 can radiate heat to ensure the running safety of the motor 19.
Example 8:
this embodiment is optimized based on embodiment 2 described above.
Screw conveyer includes auger delivery axle 18 and motor 19, the mill device includes interior mill 20 and outer mill, interior mill 20 is the end at auger delivery axle 18 of column and the coaxial setting of this interior mill 20, the annular structure in the interior mill 20 outside for coaxial setting of outer mill, leave mill clearance 21 between the lateral wall of interior mill 20 and the inside wall of outer mill, and be equipped with forward screw 27 and reverse screw 28 on the lateral wall of interior mill 20 and the inside wall of outer mill respectively, the one end in mill clearance 21 is the feed end, the other end is the discharge end, the feed end is just to the direction of delivery of thick liquids in the pipe 3 of cooking, discharge end and the discharge gate 26 intercommunication on the pipe 3 of cooking.
It should be noted that the inner grinding disc 20 is coaxially disposed at the end of the spiral conveying shaft 18, the inner grinding disc 20 rotates along with the rotation of the spiral conveying shaft 18, that is, one driving device can simultaneously drive the spiral conveying shaft 18 and the inner grinding disc 20, the outer grinding disc and the cooking tube 3 are designed as an integral body, that is, the reverse thread 28 is disposed on the inner wall of the cooking tube 3 near the discharge port 26, and in order to improve the service life of the grinding disc device, the forward thread 27 on the inner grinding disc 20 and the reverse thread 28 on the inner wall of the cooking tube 3 are both subjected to chrome plating hardening.
In order to achieve fine grinding of the pulp, the grinding disc gap 21 is gradually reduced along with the conveying direction of the pulp in the cooking tube 3, and specifically, in the embodiment, the diameter of the inner grinding disc 20 is gradually increased along with the conveying direction of the pulp in the cooking tube 3.
The cooking tube 3 is provided with a heater 22 and a cooling jacket 23. To help cool down the grinding disc arrangement, the length of the cooling jacket 23 extends to be aligned with the discharge end of the grinding disc arrangement.
Specifically, the heater 22 is arranged in the cooking pipe 3 along the length direction of the cooking pipe 3, the cooling jacket 23 is arranged outside the cooking pipe 3 along the length direction of the heater 22, the heater 22 and the cooling jacket 23 are arranged to heat the cooking device 2, and meanwhile, the temperature control function is achieved, and the temperature is controlled by the cooling jacket 23 after the heater 22 is started to heat to a certain temperature.
A power bin 24 is arranged in the position, close to a feeding hole of the cooking pipe 3, in the cooking pipe 3, a motor 19 is arranged in the power bin 24, the motor 19 drives the spiral conveying shaft 18 to rotate, the power bin 24 is a sealed space, and inert protective gas is filled in the power bin 24 and ensures the safety of the operation of the motor 19.
In order to reduce the problem that the traditional mechanical seal is expensive, a third gas pressurizing device for pressurizing the power bin 24 is further included, and the third gas pressurizing device comprises a gas pipeline 13 and a gas pressurizing pump 14. The pressure in the power bin 24 is kept balanced with the pressure in the cooking tube 3, and the normal operation of the motor 19 can be ensured without expensive mechanical sealing. An oil cooling radiating pipe 25 for radiating heat of the motor 19 is arranged in the power bin 24, and the oil cooling radiating pipe 25 can radiate heat to ensure the running safety of the motor 19.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
1. The utility model provides a pulping device is cooked to continuous violently pipe of high pressure which characterized in that: the automatic slurry feeding device comprises a feeding mechanism, a cooking mechanism, a solid-liquid-gas three-phase separation mechanism, a liquid adding device and a gas pressurizing mechanism, wherein the feeding mechanism comprises a storage bin and a conveying device, the cooking mechanism comprises at least one cooking device, the cooking device comprises a cooking pipe, a spiral conveying device and a grinding disc device are arranged in the cooking pipe, the storage bin conveys slurry into the cooking pipe through the conveying device, and the liquid adding device conveys cooking liquid into the cooking pipe in a pressurizing manner;
the solid-liquid-gas three-phase separation mechanism comprises a slurry storage bin, a blowing bin, a liquid collecting box, a gas collecting chamber and a slurry decanting pool, slurry in the cooking tube is output to the slurry storage bin, the slurry storage bin is connected with the blowing bin, a pressure filter is arranged in the blowing bin, the blowing bin comprises a liquid discharge port, a gas exhaust port and a slurry discharge port, the liquid discharge port, the gas exhaust port and the slurry discharge port are respectively connected with the liquid collecting box, the gas collecting chamber and the slurry decanting pool through pipelines, an air extractor is arranged between the blowing bin and the gas collecting chamber, a return pipeline is arranged between the liquid collecting box and the slurry storage bin, and a return pipeline is arranged between the gas collecting chamber and the slurry storage bin;
the gas pressurizing mechanism comprises a first gas pressurizing device for pressurizing the storage bin and the blowing bin and a second gas pressurizing device for pressurizing the digester.
2. The high-pressure continuous horizontal tube cooking pulping device according to claim 1, characterized in that: the storage bin comprises two feeding bins, the feeding bins are provided with liquid inlets, material loading ports and material discharging ports, the conveying device is a spiral conveying pipe, and slurry in the feeding bins is conveyed into the cooking pipe through the spiral conveying pipe after being output from the material discharging ports.
3. The high-pressure continuous horizontal tube cooking pulping device according to claim 1, characterized in that: spiral delivery mechanism includes auger delivery axle and motor, the mill device includes interior mill and outer mill, interior mill is the end of column and the coaxial setting of this interior mill at the auger delivery axle, the annular structure in the mill outside including outer mill is coaxial setting, leave the mill clearance between the lateral wall of interior mill and the inside wall of outer mill, and be equipped with forward screw thread and reverse screw thread on the lateral wall of interior mill and the inside wall of outer mill respectively, the one end in mill clearance is the feed end, and the other end is the discharge end, the feed end is just to the direction of delivery of the intraductal thick liquids of cooking, discharge end and the last discharge gate intercommunication of cooking pipe.
4. The high-pressure continuous horizontal tube cooking pulping device according to claim 3, wherein: the gap of the grinding disc is gradually reduced along with the conveying direction of the pulp in the cooking pipe.
5. The high-pressure continuous horizontal tube cooking pulping device according to claim 4, wherein: the diameter of the inner grinding disc is gradually increased along the conveying direction of the pulp in the cooking tube.
6. The high-pressure continuous horizontal tube cooking pulping device according to claim 1, characterized in that: the cooking pipe is provided with a heater and a cooling jacket.
7. The high-pressure continuous horizontal tube cooking pulping device according to claim 3, wherein: the device is characterized in that a power bin is arranged in the position, close to a feeding hole of the cooking pipe, in the cooking pipe, a motor is arranged in the power bin, the motor drives a spiral conveying shaft to rotate, and the power bin is a sealed space and is filled with inert protective gas.
8. The high-pressure continuous horizontal tube cooking pulping device according to claim 7, wherein: and the third gas pressurizing device is used for pressurizing the power bin.
9. The high-pressure continuous horizontal tube cooking pulping device according to claim 7, wherein: an oil-cooling radiating pipe for radiating the motor is arranged in the power bin.
10. The high-pressure continuous horizontal tube cooking and pulping device according to claim 1 or 8, wherein: the first gas pressurizing device, the second gas pressurizing device and the third gas pressurizing device respectively comprise a gas transmission pipeline and a gas pressurizing pump, and the liquid adding device comprises a liquid adding pipeline and a liquid pressurizing pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010178677.XA CN111304948A (en) | 2020-03-14 | 2020-03-14 | High-pressure continuous horizontal pipe cooking pulping device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010178677.XA CN111304948A (en) | 2020-03-14 | 2020-03-14 | High-pressure continuous horizontal pipe cooking pulping device |
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| CN111304948A true CN111304948A (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112476697A (en) * | 2020-11-09 | 2021-03-12 | 常德宜居建筑材料有限公司 | Integrated forming device for medium density fiberboard and manufacturing method thereof |
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| CN203238490U (en) * | 2013-03-01 | 2013-10-16 | 湖北工业大学 | Continuous cooking type double-screw pulping device |
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| DE1283666B (en) * | 1959-11-30 | 1968-11-21 | Bauer Bros Company | Digester for the continuous digestion of cellulosic material |
| US20030213860A1 (en) * | 2002-05-17 | 2003-11-20 | Milton Pilao | Taper refiner for the defibering of wood chips and similar materials |
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