Bamboo pulp black liquor extraction equipment for paper mill

Abstract

The utility model relates to the technical field of papermaking, in particular to bamboo pulp black liquor extraction equipment for a paper mill, which not only prevents impurities in black liquor from being blocked in a filter screen and avoids the trouble of frequently cleaning the filter screen, but also improves the filtration and extraction efficiency and accelerates the extraction of the black liquor. Comprising a filtering mechanism; the device further comprises an extrusion mechanism, a stirring mechanism, a distillation mechanism and an air extraction mechanism, the extrusion mechanism is installed on the filtering mechanism and extrudes the black liquor, the stirring mechanism is installed on the extrusion mechanism and pretreats the black liquor, the distillation mechanism is installed on the filtering mechanism and distills the black liquor, and the air extraction mechanism is installed on the distillation mechanism and extracts steam.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking, in particular to a device for extracting black liquor from bamboo pulp in a papermaking plant. Background Art

[0002] Bamboo pulp black liquor is a waste product in the pulp and paper industry, mainly composed of residual materials after bamboo is steamed. Since bamboo pulp black liquor contains a large amount of organic matter, if it is directly discharged into the environment, it will cause serious environmental problems.

[0003] Existing bamboo pulp black liquor extraction equipment, such as the utility model patent application number 201820330069.4, discloses an efficient black liquor extraction equipment for papermaking. Its main structure includes a shell, a feed port is provided at the bottom of the shell, a motor is installed above the shell, the output end of the motor is connected to the rotating shaft through a coupling, rotating blades are evenly installed on the surface of the rotating shaft, a filter is installed above the rotating blades, an evaporator is installed below the filter, a discharge pipe is installed at the bottom of the shell, the shell is connected to the bottom plate below through a bracket, and the top of the bottom plate A storage box is installed; when in use, pour the feed liquid into the feed inlet, turn on the control switch, and the feed liquid passes through the filter screen, which blocks the larger particles in the feed liquid and is drawn out and cleaned through the handle on the outside, and then enters the mixing box to fully break up the feed liquid, so that the solid inside is evenly stirred into liquid, and then enters the evaporator box, where the high temperature evaporates and heats and kills the internal organisms, and then enters the stone sand layer, resin non-woven fabric layer and activated carbon layer in turn, and passes through from top to bottom under the action of its own gravity, and then enters the storage box through the discharge pipe.

[0004] However, the slurry contains a large amount of impurities, which can easily clog the filter screen of the existing extraction device, requiring frequent cleaning, which is very troublesome. In addition, the filtration speed of the existing extraction device is low, resulting in low black liquor extraction efficiency. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a paper mill bamboo pulp black liquor extraction equipment which not only avoids impurities in the black liquor from being blocked in the filter screen and avoids the trouble of frequent cleaning of the filter screen, but also improves the efficiency of filtration and extraction and accelerates the extraction of black liquor.

[0006] The utility model discloses a bamboo pulp black liquor extraction device for a paper mill, comprising a filtering mechanism, an extruding mechanism, a stirring mechanism, a distilling mechanism and an exhaust mechanism, wherein the extruding mechanism is installed on the filtering mechanism and extrudes the black liquor, the stirring mechanism is installed on the extruding mechanism and pre-treats the black liquor, the distilling mechanism is installed on the filtering mechanism and distills the black liquor, and the exhaust mechanism is installed on the distilling mechanism to extract steam; a worker transports the black liquor into the stirring mechanism, the stirring mechanism pre-treats the black liquor and stirs it evenly, and then the black liquor enters the filtering mechanism, the extruding mechanism is started to transport the black liquor and squeeze and filter it at the same time, accelerating the filtration of the black liquor, the filtered black liquor enters the distilling mechanism for distillation, and the exhaust mechanism extracts steam in time to accelerate the extraction of the black liquor, and the steam can be used to accelerate the discharge of impurities during impurity removal, thereby improving the impurity discharge rate.

[0007] Preferably, the filtering mechanism includes a conveying cylinder, a filter screen, a debris removal box, a hinge, a sealing door and a handle. The bottom end of the conveying cylinder is connected to the ground. A cavity is provided inside the conveying cylinder. The filter screen is installed at the bottom end of the cavity of the conveying cylinder. The debris removal box is installed in the cavity of the conveying cylinder. The hinge is installed on the conveying cylinder, the sealing door is installed on the hinge, and the handle is installed on the sealing door. The black liquor is conveyed forward in the cavity of the conveying cylinder, the black liquor is filtered through the filter screen, the black liquor enters the distillation mechanism, and the impurities enter the debris removal box. After working for a long time, the staff pulls the handle to open the sealing door to discharge the impurities in the debris removal box.

[0008] Preferably, the extrusion mechanism includes an electric motor, a reducer, a first transmission shaft and an auger. The electric motor is installed on the conveying cylinder, the reducer is installed on the conveying cylinder, the first transmission shaft is rotatably installed in the cavity of the conveying cylinder and is longitudinally connected to the reducer, and the auger is installed on the first transmission shaft; start the motor, the motor drives the first transmission shaft to rotate through the reducer, the first transmission shaft drives the auger to rotate, the auger drives the black liquor and impurities to be transported forward, accelerates the black liquor to pass through the filter screen and impurities into the impurity removal box, avoids impurities from being blocked on the filter screen, and the impurities are squeezed in the impurity removal box, further compressing the black liquor in the impurities and allowing it to enter the distillation mechanism.

[0009] Preferably, the stirring mechanism includes an upper hopper, a driving shaft, two sets of driven shafts, multiple sets of stirring rods, three sets of gears, a first bevel gear, a second transmission shaft and a second bevel gear. The bottom end of the upper hopper is internally connected to the top end of the conveying cylinder. The driving shaft is rotatably mounted on the upper hopper. The two sets of driven shafts are rotatably mounted on the upper hopper. The multiple sets of stirring rods are respectively mounted on the driving shaft and the two sets of driven shafts. The three sets of gears are respectively mounted on the driving shaft and the two sets of driven shafts and the three sets of gears are meshed for transmission. The first bevel gear is mounted on the driving shaft, and the second transmission shaft is mounted on the reduction gear. On the machine, the second bevel gear is installed on the second transmission shaft and meshes with the first bevel gear for transmission; the material liquid is transported to the upper hopper, the reducer drives the second transmission shaft to rotate, the second transmission shaft drives the second bevel gear to rotate, the second bevel gear and the first bevel gear are meshed and driven to drive the driving shaft to rotate, the driving shaft drives the gear connected to it to rotate, the three sets of gears are meshed and driven to drive the two sets of driven shafts to rotate, the driving shaft and the two sets of driven shafts drive multiple sets of stirring rods to rotate, the multiple sets of stirring rods stir the material liquid while entangled the long impurities in the material liquid.

[0010] Preferably, the distillation mechanism includes a distillation box, a baffle, three groups of electric heating rods, a drain pipe and a first valve. The top of the distillation box is connected to the bottom end of the conveying cylinder. The interior of the distillation box is provided with an inner cavity. The baffle is installed in the inner cavity of the distillation box. The three groups of electric heating rods are all installed in the inner cavity of the distillation box. The top of the drain pipe is connected to the bottom end of the distillation box, and the first valve is installed on the drain pipe. The black liquor enters the inner cavity of the distillation box through the filter screen and the impurity removal box. The three groups of electric heating rods heat and distill the black liquor. The water in the black liquor evaporates and the water vapor is discharged through the exhaust mechanism. The flow of water vapor entering the cavity of the conveying cylinder is reduced by setting the baffle. The first valve is opened and the distilled black liquor is discharged through the drain pipe.

[0011] Preferably, the vacuum mechanism includes a pump body, a vacuum pipe, an exhaust pipe, a second valve, an air supply pipe, a third valve and multiple groups of high-pressure nozzles. The pump body is installed on the distillation box, the vacuum pipe is installed on the pump body and is connected to the inner cavity of the distillation box, the exhaust pipe is installed on the pump body, the second valve is installed on the exhaust pipe, the air supply pipe is installed in the cavity of the distillation box and is connected to the inside of the exhaust pipe, the third valve is installed on the air supply pipe, and multiple groups of high-pressure nozzles are installed on the impurity removal box and are connected to the inside of the air supply pipe; open the second valve and close the third valve, start the pump body, and the pump body will extract the water vapor in the distillation box through the vacuum pipe in time, and then transport it to the condenser through the second valve. When impurities need to be removed, close the second valve and open the third valve, and the water vapor will be transported to the multiple groups of high-pressure nozzles through the air supply pipe. The multiple groups of high-pressure nozzles will spray water vapor to accelerate the discharge of impurities.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the staff transports the black liquor into the stirring mechanism, the stirring mechanism pre-treats the black liquor and stirs it evenly, and then the black liquor enters the filtering mechanism, the extrusion mechanism is started to transport the black liquor while extruding and filtering it, accelerating the filtration of the black liquor, and the filtered black liquor enters the distillation mechanism for distillation, and at the same time the exhaust mechanism extracts the steam in time to accelerate the extraction of the black liquor, and the steam can be used to accelerate the discharge of impurities during impurity removal, thereby increasing the impurity discharge rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an axonometric structural diagram of the present utility model;

[0014] Figure 2 It is a partially enlarged sectional axonometric structural diagram of the filtering mechanism, distillation mechanism and air extraction mechanism of the utility model;

[0015] Figure 3 This is a partially enlarged sectional axonometric structural diagram of the extrusion mechanism of the utility model;

[0016] Figure 4 This is a partially enlarged axonometric structural diagram of the stirring mechanism of the utility model;

[0017] Figure 5 It is a schematic diagram of the cross-section axonometric structure of the air extraction mechanism of the utility model.

[0018] Markings in the accompanying drawings: 01, filtering mechanism; 11, conveying cylinder; 12, filter screen; 13, impurity removal box; 14, hinge; 15, sealing cover; 16, handle; 02, extrusion mechanism; 21, electric motor; 22, reducer; 23, first transmission shaft; 24, auger; 03, stirring mechanism; 31, upper hopper; 32, driving shaft; 33, driven shaft; 34, stirring rod; 35, gear; 36, first bevel gear; 37, second transmission shaft; 38, second bevel gear; 04, distillation mechanism; 41, distillation box; 42, baffle; 43, electric heating rod; 44, drain pipe; 45, first valve; 05, exhaust mechanism; 51, pump body; 52, exhaust pipe; 53, exhaust pipe; 54, second valve; 55, gas pipe; 56, third valve; 57, high-pressure nozzle. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention. Example

[0020] The utility model discloses a bamboo pulp black liquor extraction device for a paper mill, comprising a filtering mechanism 01; an extrusion mechanism 02, a stirring mechanism 03, a distillation mechanism 04 and an air extraction mechanism 05, wherein the extrusion mechanism 02 is mounted on the filtering mechanism 01 and extrudes the black liquor, the stirring mechanism 03 is mounted on the extrusion mechanism 02 and pre-treats the black liquor, the distillation mechanism 04 is mounted on the filtering mechanism 01 and distills the black liquor, and the air extraction mechanism 05 is mounted on the distillation mechanism 04 to extract steam; the filtering mechanism 01 comprises a conveying cylinder 11, a filter screen 12, a dust removal box 13, a hinge 14, a sealing door 15 and a handle 16, and the bottom end of the conveying cylinder 11 is provided with a filter screen 12, a dust removal box 13, a hinge 14, a sealing door 15 and a handle 16. The conveying cylinder 11 is connected to the ground, and a cavity is provided inside the conveying cylinder 11. The filter screen 12 is installed at the bottom end of the cavity of the conveying cylinder 11. The dust removal box 13 is installed in the cavity of the conveying cylinder 11. The hinge 14 is installed on the conveying cylinder 11. The sealing door 15 is installed on the hinge 14. The handle 16 is installed on the sealing door 15. The extrusion mechanism 02 includes a motor 21, a reducer 22, a first transmission shaft 23 and an auger 24. The motor 21 is installed on the conveying cylinder 11, the reducer 22 is installed on the conveying cylinder 11, the first transmission shaft 23 is rotatably installed in the cavity of the conveying cylinder 11 and is longitudinally connected to the reducer 22. The auger 24 is installed in the first transmission shaft. The stirring mechanism 03 includes an upper hopper 31, a driving shaft 32, two sets of driven shafts 33, multiple sets of stirring rods 34, three sets of gears 35, a first bevel gear 36, a second transmission shaft 37 and a second bevel gear 38. The bottom end of the upper hopper 31 is internally connected to the top of the conveying cylinder 11, the driving shaft 32 is rotatably mounted on the upper hopper 31, the two sets of driven shafts 33 are rotatably mounted on the upper hopper 31, the multiple sets of stirring rods 34 are respectively mounted on the driving shaft 32 and the two sets of driven shafts 33, the three sets of gears 35 are respectively mounted on the driving shaft 32 and the two sets of driven shafts 33 and the three sets of gears 35 are meshed for transmission, the first bevel gear 36 is mounted on the driving shaft The second transmission shaft 37 is mounted on the reducer 22, and the second bevel gear 38 is mounted on the second transmission shaft 37 and meshes with the first bevel gear 36 for transmission. The distillation mechanism 04 includes a distillation box 41, a baffle 42, three sets of electric heating rods 43, a discharge pipe 44 and a first valve 45. The top of the distillation box 41 is connected to the bottom end of the conveying cylinder 11. The distillation box 41 is provided with an inner cavity. The baffle 42 is mounted in the inner cavity of the distillation box 41. The three sets of electric heating rods 43 are all mounted in the inner cavity of the distillation box 41. The top of the discharge pipe 44 is connected to the bottom end of the distillation box 41. The first valve 45 is mounted on the discharge pipe 44.When it is working, first, the material liquid is transported to the upper hopper 31, the reducer 22 drives the second transmission shaft 37 to rotate, the second transmission shaft 37 drives the second bevel gear 38 to rotate, the second bevel gear 38 and the first bevel gear 36 are meshed and driven to drive the driving shaft 32 to rotate, the driving shaft 32 drives the gear 35 connected thereto to rotate, the three groups of gears 35 are meshed and driven to drive the two groups of driven shafts 33 to rotate, the driving shaft 32 and the two groups of driven shafts 33 drive the multiple groups of stirring rods 34 to rotate, the multiple groups of stirring rods 34 stir the material liquid while entangled the long impurities in the material liquid, start the motor 21, the motor 21 drives the first transmission shaft 23 to rotate through the reducer 22, the first transmission shaft 23 drives the auger 24 to rotate, the auger 24 drives The black liquor and impurities are transported forward, accelerating the passage of black liquor through the filter 12 into the distillation tank 41 and the impurities into the impurity removal tank 13, preventing impurities from clogging the filter 12. Impurities are squeezed in the impurity removal tank 13, further compressing the black liquor contained in the impurities. The black liquor then passes through the filter 12 and the impurity removal tank 13 and enters the inner cavity of the distillation tank 41. Three sets of electric heating rods 43 heat and distill the black liquor, evaporating the water in the black liquor. The water vapor is discharged through the exhaust mechanism 05. The flow of water vapor into the cavity of the conveying cylinder 11 is reduced by the installation of a baffle 42. The first valve 45 is opened, and the distilled black liquor is discharged through the drain pipe 44. After a long period of operation, the staff pulls the handle 16 to open the sealed door 15 and discharge the impurities in the impurity removal tank 13. Example

[0021] like Figures 1 to 5As shown, a bamboo pulp black liquor extraction device for a paper mill of the present invention is based on Example 1; the air extraction mechanism 05 includes a pump body 51, an air extraction pipe 52, an exhaust pipe 53, a second valve 54, an air supply pipe 55, a third valve 56 and multiple groups of high-pressure nozzles 57, the pump body 51 is installed on the distillation box 41, the air extraction pipe 52 is installed on the pump body 51 and is connected to the inner cavity of the distillation box 41, the exhaust pipe 53 is installed on the pump body 51, the second valve 54 is installed on the exhaust pipe 53, the air supply pipe 55 is installed in the cavity of the distillation box 41 and is connected to the inner cavity of the exhaust pipe 53, the third valve 56 is installed on the air supply pipe 55, and multiple groups of The high-pressure nozzles 57 are all installed on the impurity removal box 13 and are connected to the inside of the air pipe 55. When it is working, first, the material liquid is transported to the upper hopper 31, the reducer 22 drives the second transmission shaft 37 to rotate, the second transmission shaft 37 drives the second bevel gear 38 to rotate, the second bevel gear 38 and the first bevel gear 36 are engaged in transmission to drive the driving shaft 32 to rotate, the driving shaft 32 drives the gear 35 connected thereto to rotate, the three groups of gears 35 are engaged in transmission to drive the two groups of driven shafts 33 to rotate, the driving shaft 32 and the two groups of driven shafts 33 drive the multiple groups of stirring rods 34 to rotate, and the multiple groups of stirring rods 34 stir the material liquid while the long The impurities are entangled, the motor 21 is started, the motor 21 drives the first transmission shaft 23 to rotate through the reducer 22, the first transmission shaft 23 drives the auger 24 to rotate, the auger 24 drives the black liquor and impurities to be transported forward, accelerating the black liquor to pass through the filter 12 into the distillation box 41 and the impurities to enter the impurity removal box 13, avoiding impurities from being blocked on the filter 12, the impurities are squeezed in the impurity removal box 13, further compressing the black liquor in the impurities, and the black liquor passes through the filter 12 and the impurity removal box 13 into the inner cavity of the distillation box 41, the three sets of electric heating rods 43 heat and distill the black liquor, and the water in the black liquor evaporates, opening the second valve 54 and closing the third valve Door 56, start the pump body 51, the pump body 51 promptly extracts the water vapor in the distillation box 41 through the exhaust pipe 52, and then transports it to the condenser through the second valve 54. By setting the baffle 42, the flow of water vapor entering the cavity of the conveying cylinder 11 is reduced, and the first valve 45 is opened. The distilled black liquor is discharged through the drain pipe 44. After working for a long time, the staff pulls the handle 16 to open the sealing door 15, closes the second valve 54 and opens the third valve 56. The water vapor is transported to the multiple sets of high-pressure nozzles 57 through the air pipe 55. The multiple sets of high-pressure nozzles 57 spray water vapor to accelerate the discharge of impurities and discharge the impurities in the impurity removal box 13.

[0022] The motor 21, reducer 22 and pump body 51 of the utility model are purchased on the market, and technicians in this industry only need to install and operate them according to the accompanying instruction manuals without the need for creative work by technicians in this field.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A bamboo pulp black liquor extraction device for a paper mill, comprising a filtering mechanism (01); characterized in that: The invention also includes an extrusion mechanism (02), a stirring mechanism (03), a distillation mechanism (04) and an exhaust mechanism (05). The extrusion mechanism (02) is installed on the filtering mechanism (01) and extrudes the black liquor. The stirring mechanism (03) is installed on the extrusion mechanism (02) and pre-treats the black liquor. The distillation mechanism (04) is installed on the filtering mechanism (01) and distills the black liquor. The exhaust mechanism (05) is installed on the distillation mechanism (04) and extracts steam.

2. The bamboo pulp black liquor extraction equipment for a paper mill according to claim 1, characterized in that: The filtering mechanism (01) comprises a conveying cylinder (11), a filter screen (12), a dust removal box (13), a hinge (14), a sealing door (15) and a handle (16). The bottom end of the conveying cylinder (11) is connected to the ground. A cavity is provided inside the conveying cylinder (11). The filter screen (12) is installed at the bottom end of the cavity of the conveying cylinder (11). The dust removal box (13) is installed in the cavity of the conveying cylinder (11). The hinge (14) is installed on the conveying cylinder (11). The sealing door (15) is installed on the hinge (14). The handle (16) is installed on the sealing door (15).

3. The bamboo pulp black liquor extraction equipment for a paper mill as claimed in claim 2, characterized in that: The extrusion mechanism (02) includes a motor (21), a reducer (22), a first transmission shaft (23) and an auger (24), wherein the motor (21) is mounted on the conveying cylinder (11), the reducer (22) is mounted on the conveying cylinder (11), the first transmission shaft (23) is rotatably mounted in the cavity of the conveying cylinder (11) and is longitudinally connected to the reducer (22), and the auger (24) is mounted on the first transmission shaft (23).

4. The bamboo pulp black liquor extraction equipment for a paper mill as claimed in claim 3, characterized in that: The stirring mechanism (03) includes an upper hopper (31), a driving shaft (32), two sets of driven shafts (33), multiple sets of stirring rods (34), three sets of gears (35), a first bevel gear (36), a second transmission shaft (37) and a second bevel gear (38). The bottom end of the upper hopper (31) is internally connected to the top end of the conveying cylinder (11). The driving shaft (32) is rotatably mounted on the upper hopper (31). Both sets of driven shafts (33) are rotatably mounted on the upper hopper (31). The stirring rods (34) are respectively mounted on the driving shaft (32) and the two driven shafts (33), the three gears (35) are respectively mounted on the driving shaft (32) and the two driven shafts (33) and the three gears (35) are meshed for transmission, the first bevel gear (36) is mounted on the driving shaft (32), the second transmission shaft (37) is mounted on the speed reducer (22), and the second bevel gear (38) is mounted on the second transmission shaft (37) and meshed with the first bevel gear (36) for transmission.

5. The bamboo pulp black liquor extraction equipment for a paper mill as claimed in claim 2, characterized in that: The distillation mechanism (04) includes a distillation box (41), a baffle (42), three groups of electric heating rods (43), a drain pipe (44) and a first valve (45). The top end of the distillation box (41) is connected to the bottom end of the conveying cylinder (11). The interior of the distillation box (41) is provided with an inner cavity. The baffle (42) is installed in the inner cavity of the distillation box (41). The three groups of electric heating rods (43) are all installed in the inner cavity of the distillation box (41). The top end of the drain pipe (44) is connected to the bottom end of the distillation box (41). The first valve (45) is installed on the drain pipe (44).

6. The bamboo pulp black liquor extraction equipment for a paper mill as claimed in claim 5, characterized in that: The air extraction mechanism (05) includes a pump body (51), an air extraction pipe (52), an exhaust pipe (53), a second valve (54), an air supply pipe (55), a third valve (56) and a plurality of high-pressure nozzles (57). The pump body (51) is mounted on the distillation box (41), the air extraction pipe (52) is mounted on the pump body (51) and is communicated with the inner cavity of the distillation box (41), the exhaust pipe (53) is mounted on the pump body (51), the second valve (54) is mounted on the exhaust pipe (53), the air supply pipe (55) is mounted in the cavity of the distillation box (41) and is communicated with the inner cavity of the exhaust pipe (53), the third valve (56) is mounted on the air supply pipe (55), and the plurality of high-pressure nozzles (57) are all mounted on the impurity removal box (13) and are communicated with the inner cavity of the air supply pipe (55).

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