A multifunctional truncated cone filtering and drying device and filtering and drying method

Abstract

The present invention discloses a multifunctional truncated cone filter drying device and a filter drying method, including a truncated cone filter dryer, the truncated cone filter dryer including a truncated cone cylinder, a truncated cone spring coil and a filter bag; the truncated cone spring coil is installed in the internal cavity of the truncated cone cylinder and is connected to a first steam pipe; the filter bag is built and fixed in the internal cavity of the truncated cone spring coil; the space between the truncated cone cylinder, the truncated cone spring coil and the filter bag is divided into an upper gaseous suction filtration bin and a lower filtrate suction filtration bin; the vacuum port on the side wall of the truncated cone cylinder is connected to the gaseous suction filtration bin, and the filtrate outlet is connected to the filtrate suction filtration bin. The present invention integrates filtering, separation, washing and drying in the same equipment, effectively reduces the equipment investment cost and improves the filtering and drying efficiency; the truncated cone spring coil has the multiple functions of steam drying, filter cloth support and gaseous water vapor and filtrate diversion; the present invention reduces the waste liquid treatment volume, improves the utilization rate of water resources, and saves energy and reduces emissions.

Description

Technical Field

[0001] The invention relates to the technical field of solid-liquid separation, and in particular to a multifunctional truncated cone filtering and drying device and a filtering and drying method. Background Art

[0002] In the chemical, pharmaceutical and new material industries, most of the materials need to be separated from the solid and liquid, filtered, dried and other operations.

[0003] Most existing operations first separate the solid-liquid mixed materials, such as filtering and separating them using plate and frame filter presses, centrifuges, presses and other equipment, and then transferring the separated solid materials to drying equipment for drying, and finally obtaining separated and dried materials.

[0004] Among the above-mentioned treatment modes, most of them have the disadvantages of large equipment investment, high cost, large amount of industrial waste discharge, and low filtration and drying efficiency. Summary of the invention

[0005] The present invention can solve the above-mentioned shortcomings of the existing drying and filtering devices by providing a multifunctional truncated cone filtering and drying device and a filtering and drying method.

[0006] In order to solve the above technical problems, the present invention provides a multifunctional truncated cone filter-drying device, comprising: a truncated cone filter-dryer, a slurry barrel and a rinsing component;

[0007] The truncated cone filter dryer comprises a truncated cone cylinder, a truncated cone spring coil and a filter bag;

[0008] The truncated cone cylinder is a conical cylinder with a top diameter larger than a bottom diameter; a feed port and a washing port are provided on the top cover, and a discharge port is provided at the bottom; the feed port is connected to the slurry barrel through a pipeline;

[0009] The truncated cone spring coil is a conical structure with a top diameter greater than a bottom diameter, and is installed in the inner cavity of the truncated cone cylinder; the top of the truncated cone spring coil is connected to the first steam pipe, and the bottom of the truncated cone spring coil is an open end and extends from the bottom of the truncated cone cylinder;

[0010] The filter bag is built into the inner cavity of the truncated cone spring coil, and its two ends are respectively wrapped around the truncated cone spring coil;

[0011] The pipe sections on the truncated cone spring coil at a height of 1 / 4 to 1 / 2 of the top of the truncated cone cylinder and the pipe sections and the inner wall of the truncated cone cylinder are all tightly connected, dividing the space between the truncated cone cylinder, the truncated cone spring coil and the filter bag into an upper gas filtration chamber and a lower filtrate filtration chamber;

[0012] The side wall of the truncated cone cylinder is also provided with a vacuum port and a filtrate outlet, wherein the vacuum port is communicated with the gaseous filtration chamber, and the filtrate outlet is communicated with the filtrate filtration chamber;

[0013] The washing port, the vacuum port and the filtrate outlet are respectively connected to the rinsing assembly.

[0014] In a preferred embodiment of the present invention, a first guide pipe and a second guide pipe are installed in the feed port and the washing port respectively, and the outlet ends of the first guide pipe and the second guide pipe are bent toward the central axis of the truncated cone cylinder so that the outlet direction is the oblique tangent direction.

[0015] In a preferred embodiment of the present invention, the truncated cone filter-dryer further comprises a driving stirring device, and the driving stirring device comprises an auger, a frame, a reduction box and a motor;

[0016] The frame is installed on the top cover, and the frame has a connecting shaft;

[0017] The reduction box is installed on the top of the frame and connected to the motor, and the connecting shaft is connected to the reduction box through and through;

[0018] The auger is arranged vertically, with its bottom end suspended in the truncated cone cylinder and its top end connected to the connecting shaft.

[0019] In a preferred embodiment of the present invention, the connecting shaft and the auger shaft of the auger are both hollow shafts and are interconnected, and the top end of the connecting shaft is connected to the second steam pipe and the steam condensate pipe through a rotary joint.

[0020] In a preferred embodiment of the present invention, the rinsing assembly includes a first diaphragm pump, a second diaphragm pump, a first buffer tank, a second buffer tank, a condenser, a vacuum pump and a primary washing liquid storage tank;

[0021] The washing port is connected to the first diaphragm pump, the first buffer tank and the primary washing liquid storage tank in sequence through pipelines;

[0022] The vacuum port and the filtrate outlet are connected to the second buffer tank and the second diaphragm pump in sequence through pipelines respectively;

[0023] The first buffer tank and the second buffer tank are connected to the condenser and the vacuum pump in sequence through pipelines respectively.

[0024] In a preferred embodiment of the present invention, the rinsing assembly further comprises a secondary washing liquid storage tank, a mother liquid tank and a washing waste liquid tank;

[0025] The outlet pipe of the second diaphragm pump is connected to the secondary washing liquid storage tank, the mother liquid pool and the washing waste liquid pool respectively through a four-way valve; the secondary washing liquid storage tank is also connected to the first buffer tank.

[0026] In a preferred embodiment of the present invention, the condensate outlet of the condenser is connected to the second buffer tank.

[0027] In a preferred embodiment of the present invention, the top cover of the truncated cone cylinder is connected to a first inert gas valve; the top end of the first buffer tank is connected to a second inert gas valve; the first inert gas valve and the second inert gas valve are respectively connected to an inert gas delivery pipe.

[0028] In order to solve the above technical problems, the present invention also provides a filtering and drying method, which adopts the above multifunctional truncated cone filtering and drying device, and comprises the following steps:

[0029] (1) Feed filtration: The solid-liquid mixture in the slurry barrel is transported into the truncated cone cylinder, and flows out and rotates along the oblique line under the action of the first guide pipe. The liquid in the slurry barrel flows through the filter bag to the filtrate suction bin, and then enters the mother liquid pool through the second buffer tank and the second diaphragm pump in sequence through the filtrate outlet;

[0030] (2) Pulping and washing: The secondary washing liquid in the secondary washing liquid storage tank is transported into the truncated cone cylinder through the first buffer tank, the first diaphragm pump and the washing port in sequence, and the motor drives the auger to rotate to perform pulping and washing. The washed liquid flows through the filter bag to the filtrate extraction bin, and then enters the washing waste liquid pool through the filtrate outlet, the second buffer tank and the second diaphragm pump in sequence;

[0031] (3) Osmotic washing: The primary washing liquid in the primary washing liquid storage tank is transported to the inside of the truncated cone cylinder through the first buffer tank, the first diaphragm pump and the washing port in sequence, and flows out and rotates in the oblique direction under the action of the second guide pipe to perform osmotic washing. The washed liquid flows through the filter bag to the filtrate extraction tank, and then enters the secondary washing liquid storage tank through the filtrate outlet, through the second buffer tank and the second diaphragm pump in sequence;

[0032] (4) Drying: The motor drives the auger to rotate, and the first steam pipe and the second steam pipe respectively pass hot steam into the truncated cone spring coil and the auger shaft, and the washed material in the filter bag is dried by heat exchange. The water vapor generated by the drying of the material enters the gaseous filtration bin, and under the action of the vacuum pump, it enters the condenser through the vacuum port and the second buffer tank in turn for condensation. The condensed water flows into the second buffer tank, and then enters the secondary washing liquid storage tank through the second diaphragm pump;

[0033] (5) Unloading and packaging: After the drying operation in step (4) is completed, the unloading port is opened to transport the dried material to the packaging line for packaging.

[0034] In a preferred embodiment of the present invention,

[0035] In the step (1), after the feeding is completed, an inert gas is introduced into the truncated cone cylinder through the first inert gas valve to accelerate the discharge of the liquid in the solid-liquid mixture;

[0036] In the step (2), after the secondary washing liquid is introduced, an inert gas is introduced into the truncated cone cylinder through the first inert gas valve to accelerate the discharge of the secondary washing liquid;

[0037] In the step (3), after the first washing liquid is introduced, inert gas is introduced into the truncated cone cylinder through the first inert gas valve to accelerate the discharge of the first washing liquid.

[0038] The beneficial effects of the present invention are as follows: the present invention provides a multifunctional truncated cone filter-drying device and a filter-drying method, which realizes the integration of filtration separation, washing and drying in the same device through the structural design of the truncated cone filter-dryer, effectively reduces the equipment investment cost and improves the filtration drying efficiency; the truncated cone spring coil has the multiple functions of steam drying, filter cloth support and gaseous water vapor and filtrate diversion; based on the design of the washing component, the classified recovery of mother liquor, filtered waste liquid, primary washing liquid and steam condensate in the filtration drying process is realized, which is convenient for the subsequent quality-based treatment and reuse of waste liquid, effectively reduces the waste liquid treatment cost, improves the utilization rate of water resources, reduces the amount of washing liquid, and achieves the purpose of energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a three-dimensional structural schematic diagram of a preferred embodiment of a multifunctional truncated cone filtering and drying device of the present invention;

[0040] Figure 2 Schematic diagram of the structure of the truncated cone dryer shown;

[0041] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of the circled part;

[0042] The markings of the components in the accompanying drawings are as follows:

[0043] 100. Round table dryer;

[0044] 10. truncated cone cylinder, 11. first flow guide pipe, 12. second flow guide pipe, 13. slurry valve, 14. washing valve, 15. discharge valve, 16. vacuum port, 17. vacuum valve, 18. filtrate outlet, 19. filtrate valve;

[0045] 20. frustum spring coil, 21. first straight pipe section, 22. second straight pipe section;

[0046] 30. Filter bag;

[0047] 40. stirring device, 41. auger, 42. frame, 43. reduction box, 44. motor, 45. connecting shaft, 46. rotary joint;

[0048] 51. First steam pipe, 52. Second steam pipe, 53. Steam condensate pipe;

[0049] 61. first diaphragm pump, 62. second diaphragm pump, 63. first buffer tank, 64. second buffer tank, 65. condenser, 66. vacuum pump, 67. primary washing liquid storage tank, 68. secondary washing liquid storage tank, 69. mother liquor tank, 70. washing waste liquid tank, 681. washing liquid recovery valve, 691. mother liquor valve, 701. washing waste liquid valve;

[0050] 81. first inert gas valve, 82. second inert gas valve; 90. annular sealing ring;

[0051] 200. Slurry barrel, 210. Slurry pump. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0053] See also Figure 1-3 , the embodiment of the present invention includes:

[0054] The present invention discloses a multifunctional truncated cone filter-drying device, comprising a truncated cone filter-dryer 100 , wherein the truncated cone filter-dryer 100 comprises a truncated cone cylinder 10 , a truncated cone spring coil 20 , a filter bag 30 and a stirring device 40 .

[0055] The truncated cone cylinder 10 is a conical cylinder with a top diameter larger than a bottom diameter. The top of the truncated cone cylinder 10 is provided with a top cover, on which a feed port and a washing port are provided, and the bottom of the truncated cone cylinder 10 is provided with a discharge port, on which a discharge valve 15 is installed.

[0056] Specifically, a first guide pipe 11 is installed in the feed port, and the outlet end of the first guide pipe 11 is bent toward the central axis direction of the conical cylinder 10, so that the outlet direction is the oblique line direction, that is, the solid-liquid mixture to be filtered and separated flows out from the outlet end of the first guide pipe 11 along the oblique line direction, enters the conical cylinder 10, and can rotate in the conical cylinder 10 with a conical cylinder structure, so that the liquid component in the mixture flows out through the filter bag 30 to achieve filtering and separation.

[0057] A slurry valve 13 is installed at the top of the first flow guide pipe 11 , and the slurry valve 13 is connected to a slurry barrel 200 containing a solid-liquid mixture to be filtered and separated through a pipeline with a slurry pump 210 .

[0058] A second guide pipe 12 is installed in the washing port, and the outlet end of the second guide pipe 12 is bent toward the central axis of the truncated cone cylinder 10, so that the outlet direction is the oblique tangent direction, that is, the washing liquid flows out from the outlet end of the second guide pipe 12 along the oblique tangent direction, enters the truncated cone cylinder 10, and can rotate in the truncated cone cylinder 10 of the conical cylinder structure to wash the filtered wet material. A washing valve 14 is installed on the second guide pipe 12.

[0059] The truncated cone spring coil 20 is a conical structure with a top diameter greater than a bottom diameter, and is installed in the inner cavity of the truncated cone cylinder 10 and fits against the inner wall surface of the truncated cone cylinder 10 .

[0060] Sealing gaskets are installed between the first circle pipe section at the top of the truncated cone spring coil 20 and the top cover of the truncated cone cylinder 10, and between the terminal pipe section at the bottom of the truncated cone spring coil 20 and the bottom inner wall surface of the truncated cone cylinder 10 (i.e., the truncated cone surface at the bottom end), respectively, so as to ensure that under the action of the top cover and the elastic force of the truncated cone spring coil 20 itself, the truncated cone spring coil 20 is in sealed and closed contact with the inner wall surface of the top cover of the truncated cone cylinder 10 and the bottom truncated cone surface of the truncated cone cylinder 10, thereby preventing materials from flowing out of the gap at the top or bottom of the truncated cone spring coil 20.

[0061] The top of the truncated cone spring type coil 20 is provided with a vertical first straight pipe section 21, which extends from the top cover of the truncated cone cylinder 10 and is connected to the first steam pipe 51. Hot steam is introduced into the truncated cone spring type coil 20 through the first steam pipe 51 and the first straight pipe section 21, and the wet material after filtering is dried by utilizing the heat exchange effect of the tube wall of the truncated cone spring type coil 20. The truncated cone spring type coil 20 plays the role of steam heating.

[0062] The bottom end of the truncated cone spring coil 20 is provided with a vertical second straight pipe section 22, which extends from the bottom end of the truncated cone cylinder 10 and has an open end. The hot steam entering the truncated cone spring coil 20 is converted into condensed water after heat exchange and discharged from the second straight pipe section 22.

[0063] The filter bag 30 is built into the inner cavity of the truncated cone spring coil 20, and the two ends of the filter bag 30 are respectively wrapped on the pipe sections at the two ends of the truncated cone spring coil 20, so that the filter bag is tightly stretched on the pipe wall of the truncated cone spring coil 20. The truncated cone spring coil 20 is a support frame for the filter bag 30. The filter bag 30 not only plays a filtering role, but also plays a dust removal role, preventing dust from seeping out during the drying process, reducing environmental pollution, and achieving the purpose of emission reduction.

[0064] The annular sealing ring 90 is wrapped and filled between the pipe sections at 1 / 4 to 1 / 2, preferably 1 / 3 of the height from the top of the truncated cone cylinder 10 and between the pipe sections and the inner wall surface of the truncated cone cylinder 10, so that the pipe sections at this position and the inner wall surface of the truncated cone cylinder 10 are sealed and connected, and the space between the truncated cone cylinder 10, the truncated cone spring type coil 20 and the filter cloth bag 30 is divided into an upper gaseous suction filtration bin and a lower filtrate suction filtration bin. The gaseous suction filtration bin formed by this design can increase the storage space of steam generated during the drying process of wet materials, facilitate the timely extraction of this part of steam, and help to speed up the drying speed. The design of the sealing pads and sealing rings at both ends of the truncated cone spring type coil 20 and at 1 / 4 to 1 / 2 of the top of the truncated cone cylinder 10 not only plays the role of separating the flow direction of liquid and gas, but also makes the metal truncated cone spring type coil form a three-point soft support, soft contact with the truncated cone cylinder, safe to use, and also reduces the equipment investment cost.

[0065] A vacuum port 16 is provided on the upper side wall of the truncated cone cylinder 10 , and the vacuum port 16 is connected to the gaseous filtration bin and is used to remove the steam temporarily stored in the gaseous filtration bin. A vacuum valve 17 is installed at the vacuum port 16 .

[0066] The lower part of the side wall of the truncated cone cylinder 10 is provided with a filtrate outlet 18, which is connected to the filtrate suction filtration chamber, and the filtered and separated liquid is temporarily stored in the filtrate suction filtration chamber and then discharged through the filtrate outlet 18. A filtrate valve 19 is installed at the filtrate outlet 18.

[0067] The driving stirring device 40 includes an auger 41, a frame 42, a reduction box 43 and a motor 44. The frame 42 is mounted on the top cover of the truncated cone cylinder 10, and the frame 42 has a connecting shaft 45. The reduction box 43 is mounted on the top of the frame 42 and connected to the motor 44, and the connecting shaft 45 is connected to the reduction box 43. The auger 41 is arranged vertically, with its bottom end suspended in the truncated cone cylinder 10, and its top end extending out of the top cover and sealedly connected to the connecting shaft 45. The motor 44 drives the auger 41 to rotate through the reduction box 43 and the connecting shaft 45 in turn, thereby achieving stirring of the material.

[0068] Specifically, the connecting shaft 45 and the auger shaft of the auger 41 are both hollow shafts and are interconnected. The top end of the connecting shaft 45 is connected to the second steam pipe 52 and the steam condensate pipe 53 respectively through a rotary joint 46 with steam and water vapor channels. The second steam pipe 52 sequentially transports hot steam to the auger shaft of the auger 41 through the rotary joint 46 and the connecting shaft 45, and the hot steam then enters the auger blades through the auger shaft, and the wet material after filtration and separation is dried through heat exchange. The condensed water formed in the auger shaft and the auger blades due to heat exchange is then discharged to the steam condensate pipe 53 through the connecting shaft 45 and the rotary joint 46. By introducing hot steam into the auger shaft and the auger blades, the uniformity of drying can be improved, and the drying speed of the wet material can be further improved, thereby improving production efficiency.

[0069] Specifically, the auger shaft also has a hollow center tube, the auger blades are connected from top to bottom, the top auger blades and the bottom auger blades are connected to the auger shaft, and a sealing ring is installed between the inner wall of the auger shaft between the top auger blades and the bottom auger blades and the outer wall of the center tube, so that hot steam enters from the top auger blades, and condensed water generated after heat exchange flows out from the bottom auger blades, gathers at the bottom of the auger shaft, and finally enters the center tube from the bottom of the center tube and is discharged upward.

[0070] Through the design of the above-mentioned truncated cone spring coil heating, auger shaft and auger blade heating, the wet material is heated from the center and the periphery at the same time, which effectively increases the uniformity of heating, improves the drying effect, and is conducive to reducing the use of heat energy and saving energy consumption.

[0071] The second flow guide pipe 12, the vacuum port 16 and the filtrate outlet 18 are respectively connected to the rinsing assembly through pipelines.

[0072] Specifically, the rinsing assembly includes a first diaphragm pump 61 , a second diaphragm pump 62 , a first buffer tank 63 , a second buffer tank 64 , a condenser 65 , a vacuum pump 66 , a primary washing liquid storage tank 67 , and a secondary washing liquid storage tank 68 .

[0073] The second guide pipe 12 in the washing port is connected to the first diaphragm pump 61, the first buffer tank 63 and the primary washing liquid storage tank 67 in sequence through pipelines.

[0074] The vacuum port 16 and the filtrate outlet 18 are connected to the second buffer tank 64 and the second diaphragm pump 62 in sequence through pipelines, respectively.

[0075] The top ends of the first buffer tank 63 and the second buffer tank 64 are connected to the pipe side inlet of the condenser 65 through pipes with vacuum valves, respectively, and the pipe side outlet of the condenser 65 is connected to the vacuum pump 66 through a pipe.

[0076] The outlet pipe of the second diaphragm pump 62 is respectively connected to the secondary washing liquid storage tank 68, the mother liquid pool 69 and the washing waste liquid pool 70 through a four-way valve. The bottom end of the secondary washing liquid storage tank 68 is connected to the first buffer tank 63 through a pipe. A washing liquid recovery valve 681 is provided on the pipe between the four-way valve and the secondary washing liquid storage tank 68; a mother liquid valve 691 is provided on the pipe between the four-way valve and the mother liquid pool 69; and a washing waste liquid valve 701 is provided on the pipe between the four-way valve and the washing waste liquid pool 70.

[0077] The condensate outlet of the condenser 65 is also connected to the second buffer tank 64 through a pipeline with a condensate valve, so that the condensate is transported to the secondary washing liquid storage tank 68 through the second buffer tank 64 and the second diaphragm pump 62 .

[0078] Through the connection design of the second diaphragm pump 62 and the mother liquor tank 69, the washing waste liquid tank 70 and the secondary washing liquid storage tank 68, and the connection design of the secondary washing liquid storage tank 68 and the first buffer tank 63, the mother liquor and the washing waste liquid can be collected and treated at the same time to prevent arbitrary discharge and pollution of the environment. At the same time, the washing liquid and condensate that can be reused can be effectively recycled and reused, which can save water resources, save energy and reduce emissions.

[0079] In addition, the top cover of the truncated cone cylinder 10 is also provided with a first inert gas valve 81 connected to the inert gas delivery pipe; the top of the first buffer tank 63 is also provided with a second inert gas valve 82 connected to the inert gas delivery pipe, and both the first inert gas valve 81 and the second inert gas valve 82 are connected to the inert gas delivery pipe. The inert gas enters the truncated cone cylinder 10 through the first inert gas valve 81, and is used to increase the pressure and accelerate the exhaustion of the mother liquid, primary washing liquid and secondary washing liquid that have not been exhausted in the solid-liquid mixture; the inert gas enters the first buffer tank 63 through the second inert gas valve 82, so that all the primary washing liquid in the primary washing liquid storage tank 67 is effectively transported to the first buffer tank 63. The design of the first inert gas valve 81 and the second inert gas valve 82 can play a role in safe production on the one hand, and on the other hand, it can accelerate the filtration speed and improve the production efficiency.

[0080] The present invention also discloses a filtering and drying method, which uses the multifunctional truncated cone filtering and drying device, and specifically comprises the following steps:

[0081] (1) Feed filtration: Open the slurry valve 13, the filtrate valve 19, the mother liquid valve 691 and the vacuum valve on the pipeline between the second buffer tank 64 and the condenser 65; start the slurry pump 210, the vacuum pump 66 and the second diaphragm pump 62;

[0082] Under the action of the slurry pump 210, the solid-liquid mixture in the slurry barrel 200 is transported to the filter bag 30 in the truncated cone cylinder 10. The solid-liquid mixture flows out along the oblique line through the first guide pipe 11, enters the filter bag 30 and rotates. During the rotation process, the liquid in the solid-liquid mixture flows through the filter bag 30 to the filtrate extraction bin.

[0083] The liquid in the filtrate suction filtration bin flows through the second buffer tank 64 and the second diaphragm pump 62 in sequence through the pipeline, and finally enters the mother liquid pool 69;

[0084] When the amount of wet material after filtration and separation in the truncated cone cylinder 10 reaches a set amount, the slurry valve 13 and the slurry pump 210 are closed, and the first inert gas valve 81 is opened to allow the inert gas to enter the truncated cone cylinder 10. Under the action of the inert gas pressure, the residual liquid is accelerated to be discharged into the filtrate suction bin, thereby improving the filtration and separation speed and effect;

[0085] The first inert gas valve 81, the filtrate valve 19 and the mother liquor valve 691 are closed in sequence.

[0086] (2) Pulping and washing: open the washing valve 14, the washing waste liquid valve 701, the secondary washing liquid valve on the pipeline between the first buffer tank 63 and the secondary washing liquid storage tank 68, and the vacuum valve on the pipeline between the second buffer tank 64 and the condenser 65; start the first diaphragm pump 61 and the motor 44;

[0087] Under the action of the vacuum pump 66, the secondary washing liquid in the secondary washing liquid storage tank is first pumped into the first buffer tank 63, and then under the action of the first diaphragm pump 61, the secondary washing liquid in the first buffer tank 63 is transported into the truncated cone cylinder 10;

[0088] The motor 44 drives the auger 41 to rotate. Under the action of the auger stirring and rotating, the secondary washing liquid is pulped and mixed with the wet material to achieve pulping and washing. During the pulping and washing process, the secondary washing liquid first penetrates into the filtrate suction bin through the filter bag 30, and then, under the action of the vacuum pump 66, flows through the second buffer tank 64 and the second diaphragm pump 62 through the pipeline in sequence, and finally enters the washing waste liquid pool 70 for collection;

[0089] When the secondary washing liquid in the secondary washing liquid storage tank 68 is emptied, the vacuum regulating valve is closed, and the first inert gas valve 81 is opened to allow the inert gas to enter the truncated cone cylinder 10, and the residual secondary washing liquid is accelerated to be discharged into the filtrate extraction bin under the action of the inert gas pressure; the first inert gas valve 81 and the washing waste liquid valve 701 are closed; and the motor 44 is turned off.

[0090] (3) Permeate washing: open the washing liquid recovery valve 681, the second inert gas valve 82 and the primary washing liquid valve between the primary washing liquid storage tank 67 and the first buffer tank 63;

[0091] Inert gas is introduced into the first buffer tank 63 through the second inert gas valve 82. Under the action of the inert gas pressure and the first diaphragm pump 61, the primary washing liquid measured in the primary washing liquid storage tank 67 is transported to the truncated cone cylinder 10, flows through the first guide pipe 11, and then flows out along the oblique line direction, enters the filter bag 30 and rotates. During the rotation process, the primary washing liquid flows through the wet material to achieve permeation washing.

[0092] The primary washing liquid first penetrates the wet material, then penetrates the filter bag 30 and flows into the filtrate suction bin, and finally enters the secondary washing liquid storage tank 68 through the second buffer tank 64 and the second diaphragm pump 62 for storage and reuse;

[0093] When the primary washing liquid in the first buffer tank 63 is transported out, the second inert gas valve 82 and the first diaphragm pump 61 are closed, and the first inert gas valve 81 is opened to allow the inert gas to enter the truncated cone cylinder 10. Under the action of the inert gas pressure, the remaining primary washing liquid is accelerated to be discharged into the filtrate extraction bin.

[0094] (4) Drying: Open the steam valve, vacuum valve 17 and washing liquid recovery valve 681 on the first steam pipe 51 and the second steam pipe 52; start the motor 44;

[0095] The auger 41 is driven to rotate by the motor 44; hot steam is introduced into the truncated cone spring coil 20 and the auger shaft through the first steam pipe 51 and the second steam pipe 52 respectively, and the wet material in the truncated cone cylinder 10 is dried through the heat exchange of the auger shaft, the auger blades and the truncated cone spring coil 20. The water vapor generated during the drying process of the wet material enters the gaseous filtration bin, and then flows into the second buffer tank 64 through the vacuum valve 17 and the pipeline, and finally enters the condenser 65 for condensation. The condensed condensate flows into the second buffer tank 64, and is transported to the secondary washing liquid storage tank 68 for recovery and reuse under the action of the second diaphragm pump 62;

[0096] When the wet materials in the truncated cone cylinder 10 are completely dried, the steam valves, the vacuum pump 66 and the second diaphragm pump 62 on the first steam pipe 51 and the second steam pipe 52 are closed in sequence.

[0097] (5) Unloading and packaging: After the drying operation in step (4) is completed, the unloading valve 15 at the unloading port is opened to transport the dried material to the packaging line for packaging.

[0098] The above-mentioned filtration and drying method has the following advantages:

[0099] Through the design of the washing component, on the one hand, the filtered mother liquor and washing waste liquid can be stored separately, which is convenient for subsequent quality separation treatment, reducing the cost of waste liquid treatment and reducing environmental pollution; on the other hand, the washing liquid after permeation washing and the steam condensate generated during the drying process are collected in the secondary washing liquid storage tank and used as washing liquid for stirring washing, realizing the reuse of water resources, thereby reducing the use of washing liquid and reducing washing costs.

[0100] Through the design of the secondary washing liquid pulping washing and the primary washing liquid penetration washing method, the use amount of washing liquid can be effectively reduced while ensuring the washing effect, thereby reducing the production cost.

[0101] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multifunctional truncated cone filtering and drying device, characterized in that: include: frustum filter dryers, slurry drums and rinse assemblies; The truncated cone filter dryer comprises a truncated cone cylinder, a truncated cone spring coil and a filter bag; The truncated cone cylinder is a conical cylinder with a top diameter larger than a bottom diameter; a feed port and a washing port are provided on the top cover, and a discharge port is provided at the bottom; the feed port is connected to the slurry barrel through a pipeline; The truncated cone spring coil is a conical structure with a top diameter greater than a bottom diameter, and is installed in the inner cavity of the truncated cone cylinder; the top of the truncated cone spring coil is connected to the first steam pipe, and the bottom of the truncated cone spring coil is an open end and extends from the bottom of the truncated cone cylinder; The filter bag is built into the inner cavity of the truncated cone spring coil, and its two ends are respectively wrapped around the truncated cone spring coil; The pipe sections on the truncated cone spring coil at a height of 1 / 4 to 1 / 2 of the top of the truncated cone cylinder and the pipe sections and the inner wall of the truncated cone cylinder are all tightly connected, dividing the space between the truncated cone cylinder, the truncated cone spring coil and the filter bag into an upper gas filtration chamber and a lower filtrate filtration chamber; The side wall of the truncated cone cylinder is also provided with a vacuum port and a filtrate outlet, wherein the vacuum port is communicated with the gaseous filtration chamber, and the filtrate outlet is communicated with the filtrate filtration chamber; The washing port, the vacuum port and the filtrate outlet are respectively connected to the rinsing assembly.

2. A multifunctional truncated cone filtering and drying device according to claim 1, characterized in that: The first guide pipe and the second guide pipe are respectively installed in the feed port and the washing port, and the outlet ends of the first guide pipe and the second guide pipe are bent toward the central axis of the truncated cone cylinder so that the outlet direction is the oblique tangent direction.

3. The multifunctional truncated cone filtering and drying device according to claim 2, characterized in that: The truncated cone filter-dryer further comprises a driving stirring device, which comprises an auger, a frame, a reduction box and a motor; The frame is installed on the top cover, and the frame has a connecting shaft; The reduction box is installed on the top of the frame and connected to the motor, and the connecting shaft is connected to the reduction box through and through; The auger is arranged vertically, with its bottom end suspended in the truncated cone cylinder and its top end connected to the connecting shaft.

4. The multifunctional truncated cone filtering and drying device according to claim 3, characterized in that: The connecting shaft and the auger shaft of the auger are both hollow shafts and are interconnected. The top end of the connecting shaft is connected to the second steam pipe and the steam condensate water pipe through a rotary joint.

5. The multifunctional truncated cone filtering and drying device according to claim 4, characterized in that: The rinsing assembly includes a first diaphragm pump, a second diaphragm pump, a first buffer tank, a second buffer tank, a condenser, a vacuum pump and a primary washing liquid storage tank; The washing port is connected to the first diaphragm pump, the first buffer tank and the primary washing liquid storage tank in sequence through pipelines; The vacuum port and the filtrate outlet are connected to the second buffer tank and the second diaphragm pump in sequence through pipelines respectively; The first buffer tank and the second buffer tank are connected to the condenser and the vacuum pump in sequence through pipelines respectively.

6. The multifunctional truncated cone filtering and drying device according to claim 5, characterized in that: The rinsing assembly also includes a secondary washing liquid storage tank, a mother liquid tank and a washing waste liquid tank; The outlet pipe of the second diaphragm pump is connected to the secondary washing liquid storage tank, the mother liquid pool and the washing waste liquid pool respectively through a four-way valve; the secondary washing liquid storage tank is also connected to the first buffer tank.

7. The multifunctional truncated cone filtering and drying device according to claim 6, characterized in that: The condensate outlet of the condenser is connected to the second buffer tank.

8. The multifunctional truncated cone filtering and drying device according to claim 7, characterized in that: The top cover of the truncated cone cylinder is connected to a first inert gas valve; the top end of the first buffer tank is connected to a second inert gas valve; the first inert gas valve and the second inert gas valve are respectively connected to an inert gas delivery pipe.

9. A filtering and drying method, characterized in that: The multifunctional truncated cone filtering and drying device according to claim 8 comprises the following steps: (1) Feed filtration: The solid-liquid mixture in the slurry barrel is transported into the truncated cone cylinder, and flows out and rotates along the oblique line under the action of the first guide pipe. The liquid in the slurry barrel flows through the filter bag to the filtrate suction bin, and then enters the mother liquid pool through the second buffer tank and the second diaphragm pump in sequence through the filtrate outlet; (2) Pulping and washing: The secondary washing liquid in the secondary washing liquid storage tank is transported into the truncated cone cylinder through the first buffer tank, the first diaphragm pump and the washing port in sequence, and the motor drives the auger to rotate to perform pulping and washing. The washed liquid flows through the filter bag to the filtrate extraction bin, and then enters the washing waste liquid pool through the filtrate outlet, the second buffer tank and the second diaphragm pump in sequence; (3) Osmotic washing: The primary washing liquid in the primary washing liquid storage tank is transported to the inside of the truncated cone cylinder through the first buffer tank, the first diaphragm pump and the washing port in sequence, and flows out and rotates in the oblique direction under the action of the second guide pipe to perform osmotic washing. The washed liquid flows through the filter bag to the filtrate extraction tank, and then enters the secondary washing liquid storage tank through the filtrate outlet, through the second buffer tank and the second diaphragm pump in sequence; (4) Drying: The motor drives the auger to rotate, and the first steam pipe and the second steam pipe respectively pass hot steam into the truncated cone spring coil and the auger shaft, and the washed material in the filter bag is dried by heat exchange. The water vapor generated by the drying of the material enters the gaseous filtration bin, and under the action of the vacuum pump, it enters the condenser through the vacuum port and the second buffer tank in turn for condensation. The condensed water flows into the second buffer tank, and then enters the secondary washing liquid storage tank through the second diaphragm pump; (5) Unloading and packaging: After the drying operation in step (4) is completed, the unloading port is opened to transport the dried material to the packaging line for packaging.

10. The filtering and drying method according to claim 9, characterized in that: In the step (1), after the feeding is completed, an inert gas is introduced into the truncated cone cylinder through the first inert gas valve to accelerate the discharge of the liquid in the solid-liquid mixture; In the step (2), after the secondary washing liquid is introduced, an inert gas is introduced into the truncated cone cylinder through the first inert gas valve to accelerate the discharge of the secondary washing liquid; In the step (3), after the first washing liquid is introduced, inert gas is introduced into the truncated cone cylinder through the first inert gas valve to accelerate the discharge of the first washing liquid.

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