Horizontal rotary drum filter press
The horizontal drum filter press addresses structural and safety issues of existing drum filter presses by implementing a new design with high-pressure filtration and fully enclosed operation, enhancing filtration efficiency and safety while meeting GMP standards.
Patent Information
- Application Number
- CN202411547192.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2024-12-17
AI Technical Summary
Existing drum filter presses in the pharmaceutical and chemical industries face issues such as complex structure, high cost, low filtration pressure, environmental hazards, and limited filtration efficiency, with the German BHS equipment needing upgrades for improved safety and hygiene.
A horizontal drum filter press with a new structure featuring a cylindrical filter press unit, multi-layer sintered mesh, and a fully enclosed, fully automatic continuous cycle for feeding, washing, and unloading, capable of reaching 12 bar working pressure and doubling filtration area while meeting GMP hygiene standards.
The new design achieves high-pressure filtration, high efficiency, fully enclosed operation, and meets GMP hygiene requirements, replacing existing equipment with improved safety, low maintenance, and large processing capacity.
Smart Images
Figure CN119139770A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of solid-liquid separation equipment in the pharmaceutical and chemical industries, and particularly refers to a continuous solid-liquid separation equipment which has N filter press units radially distributed on a rotary drum and connected to the filter press units via a distribution plate and pipelines to continuously perform feeding, washing, filter pressing and unloading. Background Art
[0002] In the pharmaceutical and chemical manufacturing fields, solid-liquid separation equipment is widely used, such as filter centrifuges, horizontal screw sedimentation centrifuges, vacuum filters, plate and frame filter presses, drum filter presses, etc.
[0003] At present, the drum filter press used in the domestic pharmaceutical and chemical industries is mainly from the German BHS company. It was developed in the early 1950s. Its outer drum and inner drum constitute the main structure of the filter. N fan-shaped filter chambers are radially divided on the outer periphery of the inner drum to form a filter unit. The filter cloth is installed on the bottom of the filter chamber. The outer drum is installed with a sealing partition unit relative to the inner drum, and the N filter units of the inner drum are divided into four functional areas, namely the feeding area, washing area, filter pressing area, and unloading area. The motor drives the inner drum to rotate through the reducer to complete the operation of the above four functional areas to realize solid-liquid Separation, drum filter press has the following advantages compared with other filtering equipment: large processing capacity, low energy consumption, no high-speed rotation, good safety, low maintenance cost, etc., drum filter press has the following disadvantages compared with other filtering equipment: open unloading, not environmentally friendly, such as harmful materials, toxic gases, etc. will cause harm to operators and the environment, the equipment structure is complex, the cost is high, the cross-section of the filter unit is a fan-shaped tetrahedron structure, which is not conducive to high-pressure filtration, etc., there are only a few companies in China that have the ability to imitate, and the German BHS filter press equipment has not been significantly modified or upgraded so far. Summary of the invention
[0004] The purpose of the present invention is to provide a drum filter press with a brand-new structure, fully enclosed, fully automatic continuous cycle feeding, washing, filtration and unloading. When its overall dimensions are equal to those of the German BHS equipment, the filtration area of the equipment is twice that of the German BHS equipment. The working pressure of its filtration unit can reach 12 bar, which is higher than the maximum working pressure of 6 bar of the German BHS equipment. The filtration efficiency is theoretically more than four times. Its technical characteristics are high-pressure filtration, high production efficiency, fully enclosed operation, and the sanitary level meets the production requirements of GMP workshops.
[0005] The object of the present invention is achieved in this way: a horizontal drum filter press, the drum filter press comprises (see Figure 1 ), including a "cylindrical filter press unit" with a drum distributed along the periphery (see Figure 4 , Figure 5 ), "cylindrical filter press unit" (see Figure 1) consists of a multi-layer sintered mesh, a perforated plate supporting cylinder, a filtrate collecting cylinder, a screw, a plunger, a feed check valve, a washing liquid check valve, a filter press gas check valve, a left screw bearing, a right screw bearing, a filter press cylinder left end cover, a filter press cylinder right end, a screw shaft supporting frame, a screw drive gear supporting bearing, a screw drive gear, etc.
[0006] The left end face of the drum body is connected to the flange plate at the left end of the drum shaft. The shaft is equipped with a bearing and a bearing seat. The bearing seat is installed on the frame. The left end of the drum body is connected to the reducer through a coupling. The reducer is driven by a motor to drive the drum body to rotate (see Figure 1 ).
[0007] The right end face of the drum body is connected to the flange at the right end of the drum shaft. The shaft is equipped with a bearing and a bearing seat, and the bearing seat is installed on the frame (see Figure 1 ).
[0008] A set of distribution plates are installed on each side of the drum shaft (see Figure 1 ), consists of a static plate, a dynamic plate, a thrust bearing seat, a thrust bearing and an adjusting screw. The right static plate is equipped with a feed port, a drain port, a filter press port and a back-blowing port, and the feed port, drain port, filter press port and back-blowing port distributed on the dynamic plate are connected to the corresponding "cylindrical filter press unit" pipeline. The static plate is mounted on the drum shaft through a bearing centering sleeve and fixed on the frame (see Figure 6 , d), the adjusting screw is used to adjust the gap between the moving plate and the static plate.
[0009] The left static plate is equipped with a discharge port and a washing port, while the discharge port and washing port distributed on the dynamic plate are connected to the corresponding "cylindrical filter press unit" pipeline (see Figure 1 ), the stator is mounted on the drum shaft through the bearing centering sleeve and fixed on the frame (see Figure 6 , c), consists of a thrust bearing, a bearing seat, and an adjusting screw. The adjusting screw is used to adjust the gap between the moving plate and the static plate.
[0010] The phase and corresponding angle of the inlet and outlet of the distribution plates on the left and right sides of the drum shaft are equal (see Figure 7 , Fig. 9 ).
[0011] A plunger valve reducer is installed on the left side of the frame, and a torque overload clutch gear is installed on the output shaft of the reducer. A screw-driven reducer is installed on the right side of the frame. The screw reducer transmission gear, when the "cylinder filter press unit" is in the unloading D position of the drum, the plunger valve transmission gear meshes with the reducer torque overload clutch gear, and the screw transmission gear meshes with the screw reducer gear (see Figure 6 ).
[0012] The drum rotates one circle to complete the processes of feeding A, washing B, filtration C----C, and unloading D. A, B, and D are three stations, and C-C can be N stations. If the drum has 12 stations distributed in the longitudinal direction, the number of stations C-C is equal to 12 minus A, B, and D, which is equal to 9 stations. The "cylindrical filter press unit" is in the filtration state at the same time (see Figure 4 Figure 5 ).
[0013] The unloading process of the above-mentioned "cylindrical filter press unit" is: when the "cylindrical filter press unit" is at the unloading D station (see Figure 6 ) The plunger valve transmission gear meshes with the reducer torque overload clutch gear, the screw transmission gear meshes with the screw reducer gear, the plunger valve reducer opens the plunger valve to unload through gear transmission, and at the same time, the screw reducer is opened to drive the screw to rotate through gear transmission to peel the filter material from the filter screen and push it to the discharge port. At the unloading D station, the discharge port pipeline of the "cylinder filter press unit" is connected to the backflush port on the right distribution plate, and the compressed air backflushs from the outside of the filter screen to the inside to press the filter material out of the filter cartridge and regenerate the filter screen at the same time. When the filter material is agglomerated, the blade A welded at the end of the screw blade and the blade B welded on the end cover plate cut and crush the block filter material so that the filter material can be unloaded smoothly. After the above working steps are completed within the set unloading time, the plunger valve reducer is opened to reverse and close the plunger valve. The stroke length of the plunger valve core is controlled by the stroke switch. After the screw reducer is turned off, the unloading is completed, and the drum reducer is started to drive the drum to the next step.
[0014] Working principle of the rotary filter press of the present invention: 1. Discharging: When the "cylindrical filter press unit" is in the discharging D position (see Figure 6 ) The plunger valve transmission gear meshes with the reducer torque overload clutch gear, the screw transmission gear meshes with the screw reducer gear, the plunger valve reducer opens the plunger valve to unload through gear transmission, and at the same time, the screw reducer is opened to drive the screw to rotate through gear transmission to peel the filter material from the filter screen and push it to the discharge port. At the unloading D station, the discharge port pipeline of the "cylinder filter press unit" is connected to the backflush port on the right distribution plate, and the compressed air backflushs from the outside of the filter screen to the inside to press the filter material out of the filter cartridge and regenerate the filter screen at the same time. When the filter material is agglomerated, the blade A welded at the end of the screw blade and the blade B welded on the end cover plate cut and crush the block filter material so that the filter material can be unloaded smoothly. After the above working steps are completed within the set unloading time, the plunger valve reducer is opened to reverse and close the plunger valve. The stroke length of the plunger valve core is controlled by the stroke switch. After the screw reducer is turned off, the unloading is completed, and the drum reducer is started to drive the drum to the next step.
[0015] 2. Feeding: When the "cylindrical filter press unit" after unloading is at the feeding A station, the suspension in the crystallizer or storage tank is pressurized or pumped through the right distribution plate and the connected pipe into the "cylindrical filter press unit", and the suspension is squeezed on the surface of the filter screen, and the filtrate passes through the filter screen and enters the filtrate discharge system through the drain port. The retained solid matter accumulates on the surface of the filter screen to form a filter cake. The feed amount of the suspension, the concentration of the suspension, and the preset thickness of the filter cake reach the flow meter setting value when the "cylindrical filter press unit" room is completely filled with the preset material. The feeding is completed, and the drum reducer is started to drive the drum to the next station.
[0016] 3. Washing: When the "cylindrical filter press unit" filled with preset substances enters the washing station B, the washing liquid in the washing tank is pressurized or pumped through the left distribution plate and the connected pipe into the "cylindrical filter press unit". The washing liquid washes the filter cake in the spiral channel formed by the screw of the filter press unit. The washing liquid passes through the filter cake and the filter screen and enters the filtrate discharge system through the drain port. The washing pressure and washing volume of the washing liquid are set and controlled by the flow meter. After the washing is completed, the drum reducer is started to drive the drum to enter the next station.
[0017] 4. Filter pressing: After washing, the "cylindrical filter pressing unit" enters the filter pressing station C-C. High-pressure air or high-pressure nitrogen enters the "cylindrical filter pressing unit" through the right distribution plate and the connected pipe. The high-pressure gas filters the filter cake in the spiral channel formed by the screw of the filter pressing unit. The filter pressing liquid passes through the filter cake and the filter screen and enters the filtrate discharge system through the drain port. The designed working pressure can reach 12 bar. After the filter pressing is completed, start the drum reducer to drive the drum to rotate and enter the next station. Each "cylindrical filter pressing unit" repeats the unloading G, feeding A, washing B, and filter pressing C-C processes in a cycle (the drum reducer is equipped with a brake motor, and the rotation of one station is controlled by the travel switch).
[0018] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects: the rotary drum filter press of the present invention utilizes the screw unloading function and effect of the "cylinder filter press unit" to realize a closed unloading method. When its outer dimensions are equal to those of the German BHS equipment, the filtering surface of the equipment is twice that of the German BHS equipment. The working pressure of its filtering unit can reach 12 bar, which is higher than the maximum working pressure of 6 bar of the German BHS equipment. Theoretically, the filtering efficiency is more than four times. Its technical characteristics are as follows: 1. It can directly replace the filtering centrifuge, plate and frame filter press, rotary drum vacuum filter, and two-in-one filter; 2. It has a large processing capacity, low energy consumption, no high-speed rotating part, good safety, and low maintenance cost; 3. It has high-pressure filtration, fully enclosed operation, and a hygiene level that meets the production requirements of the GMP workshop, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a front view (half-section view) of the rotary drum filter press of the present invention.
[0020] Figure 2 It is the right view.
[0021] Figure 3 It is the left view.
[0022] Figure 4 It is the AA section view.
[0023] Figure 5 It is a BB cross-sectional view.
[0024] Figure 6 They are (right view AOA) section view and (left view BOOOOOB) section view.
[0025] Figure 7 It is the static disk allocation view on the right.
[0026] Figure 8 It is the right side dynamic disk allocation view.
[0027] Fig. 9 It is the static disk allocation view on the left.
[0028] Fig.10 It is the left dynamic disk allocation view. DETAILED DESCRIPTION
[0029] The present invention will be further described below with reference to the accompanying drawings using specific embodiments. Figure 1 ), including a "cylindrical filter press unit" with a radial distribution of drums (see Figure 4 , Figure 5 ), "cylindrical filter press unit" (see Figure 1 ) consists of a multi-layer sintered mesh 19, a perforated plate supporting cylinder 20, a filtrate collecting cylinder 21, a screw 22, a plunger 16, a feed check valve 28, a washing liquid check valve 15, a filter press gas check valve 25, a screw left end bearing 18, a screw right end bearing 23, a filter press cartridge left end cover 17, a filter press cartridge right end 24, a screw shaft supporting frame 30, a screw drive gear supporting bearing 29, a screw drive gear 31, etc.
[0030] The left end face of the drum body 55 is connected to the flange plate at the end of the left drum shaft 46. The shaft is installed with a bearing 04 and a bearing seat 05. The bearing seat 05 is installed on the frame 58. The left end of the drum body 55 is connected to the reducer 02 through a coupling 03. The reducer 02 is driven by the motor 01 to drive the drum body 55 to rotate (see Figure 1 ).
[0031] The right end surface of the drum body 55 is connected to the flange of the right drum shaft 47, and the shaft is installed with a bearing 38 and a bearing seat 37, and the bearing seat 37 is installed on the frame 55 (see Figure 1 ).
[0032] A set of distribution plates are installed on each side of the drum shaft (see Figure 1 ), which consists of a static plate, a dynamic plate, a thrust bearing seat, a thrust bearing and an adjusting screw. The right static plate 33 is equipped with a feed port 35, a liquid discharge port 36, a filter press gas inlet 34, and a backflush port 59 (see Figure 6 ), and the feed pipe 44, the drain pipe 43, the filter press air inlet pipe 45 distributed on the moving disc are connected with the correspondingly distributed "cylindrical filter press unit" pipeline, and the static disc 33 is installed on the drum shaft 47 through the bearing 42 and fixed on the frame 58 (see Figure 6 , d), consisting of a right thrust bearing 39, a right bearing seat 37, and an adjusting screw 40, wherein the adjusting screw 40 is used to adjust the clearance between the moving plate and the static plate.
[0033] The left static plate 09 is provided with a discharge port 48 and a washing liquid inlet 49, and the discharge pipe 11 and the washing pipe 12 distributed on the left dynamic plate 10 are connected to the correspondingly distributed "cylindrical filter press unit" pipeline (see Figure 1 ), the left stator plate 09 is mounted on the left drum shaft 46 through the bearing 50 and fixed on the frame 58 (see Figure 6 , c), consisting of the left thrust bearing 08, the left thrust bearing seat 06, and the adjusting screw 07. The adjusting screw 07 is used to adjust the clearance between the moving plate and the static plate.
[0034] The phase and corresponding angle of the inlet and outlet of the distribution plates on the left and right sides of the drum shaft are equal (see Figure 7 , Fig. 9 ).
[0035] A plunger valve reducer 51 is installed on the left side of the frame, and a torque overload clutch gear 52 is installed on the reducer output shaft. A screw-driven reducer 57 and a screw reducer transmission gear 56 are installed on the right side of the frame. When the "cylinder filter press unit" is in the unloading D position of the drum, the plunger valve transmission gear 53 meshes with the torque overload clutch gear 52, and the screw transmission gear 31 meshes with the screw reducer gear 56 (see Figure 6 ).
[0036] The drum rotates one circle to complete the processes of feeding A, washing B, filtration C----C, and unloading D. A, B, and D are three stations, and C-C can be set as N stations. If the drum has 12 stations distributed in the longitudinal direction, the number of stations of C-C is equal to 12 minus A, B, and D, which is equal to 9 stations of the "cylindrical filter press unit" in the filtration state at the same time (see Figure 4 Figure 5 ).
[0037] The unloading process of the above-mentioned "cylindrical filter press unit" is: when the "cylindrical filter press unit" is at the unloading D station (see Figure 6) The plunger valve transmission gear 53 meshes with the reducer torque overload clutch gear 52, the screw transmission gear 31 meshes with the screw reducer gear 56, the plunger valve reducer 51 opens the plunger valve 16 through gear transmission to discharge, and at the same time opens the screw reducer 57 to drive the screw 22 to rotate through the gears 31 and 56 to peel the filter material from the filter screen and push it to the discharge port. At the discharge station D, the discharge pipe 43 of the "cylinder filter press unit" is connected to the backflush port 59 on the right static plate 33, and the compressed air passes through the backflush port and the discharge pipe from the outside of the filter screen. The filter material is pressed out of the filter cartridge by backblowing inwards, and the multi-layer sintered mesh filter cartridge 19 is regenerated at the same time. When the filter material is agglomerated, the blade A 13 welded at the end of the screw blade and the blade B 14 welded on the end cover plate cut and crush the block filter material, so that the filter material can be discharged smoothly within the set unloading time. The plunger valve reducer 51 is opened and reversed to close the plunger valve 16. The stroke length of the valve core of the plunger valve 16 is controlled by the stroke switch. After shutting down the screw reducer 57, the unloading is completed, and the drum reducer 02 is started to drive the drum to the next step.
Claims
1. A rotary drum filter press, wherein "cylindrical filter press units" are distributed radially on the drum body, the orifice support cylinder and the filtrate collecting cylinder constituting the "cylindrical filter press unit" are welded on the two side plates of the drum body, the left end cover of the filter press cylinder is mounted on the left side of the drum body, the right end cover of the filter press cylinder is mounted on the right side of the drum body, the screw is mounted in the bearings of the left and right end covers of the filter press cylinder, the plunger valve and the washing liquid check valve are mounted on the left end cover of the filter press cylinder, the feed check valve and the filter pressure gas check valve are mounted on the right end cover of the filter press cylinder, the drain pipe is welded on the filtrate collecting cylinder, the screw shaft is equipped with a support frame, bearings, and transmission gears, the two end surfaces of the drum body are connected to the two shafts with flanges, the shafts are equipped with bearings and bearing seats, the bearing seats are mounted on the frame, the shaft end on one side of the drum is connected to the reducer through a coupling, the reducer is driven by a motor to drive the drum to rotate, and the shafts on both sides of the drum are each equipped with a gear. A set of distribution plates, the distribution plates are composed of a static plate and a dynamic plate, the static plate on the left is provided with a discharge port and a washing liquid inlet, and the discharge pipe and the washing pipe on the dynamic plate are connected with the correspondingly distributed "cylindrical filter press unit", the distribution plate on the right is composed of a static plate and a dynamic plate, the static plate is provided with a feed port, a liquid discharge port, a filter press port, and a back-blowing port, and the feed pipe, the liquid discharge pipe, and the filter press pipe on the dynamic plate are connected with the correspondingly distributed "cylindrical filter press unit", the inlet and outlet phases of the distribution plates on both sides of the drum are of equal corresponding angles, a plunger valve reducer is installed on the left side of the frame, and a torque overload clutch gear is installed on the output shaft of the reducer, a screw-driven reducer and a screw reducer transmission gear are installed on the right side of the frame, when the "cylindrical filter press unit" is at the unloading D station of the drum, the plunger valve transmission gear meshes with the reducer torque overload clutch gear, and the screw transmission gear meshes with the screw reducer gear.
2. A horizontal drum filter press according to claim 1, characterized in that: The "cylindrical filter press unit" with radial distribution of the drum body is composed of multi-layer sintered mesh, perforated plate support cylinder, filtrate collection cylinder, screw, blade A, blade B, plunger W, feed check valve, washing liquid check valve, filter press gas check valve, left screw bearing, right screw bearing, left end cover of filter press cylinder, right end of filter press cylinder, screw shaft support frame, screw drive gear support bearing, screw drive gear, etc.
3. A horizontal drum filter press according to claim 1, characterized in that: The left end face of the drum body is connected to the flange at the left end of the drum shaft, a bearing and a bearing seat are installed on the shaft, and the bearing seat is installed on the frame. The left end of the drum body is connected to the reducer through a coupling, and the reducer is driven by a motor to drive the drum body to rotate. The right end face of the drum body is connected to the flange at the right end of the drum shaft, a bearing and a bearing seat are installed on the shaft, and the bearing seat is installed on the frame.
4. A horizontal drum filter press according to claim 1, characterized in that: A set of distribution plates is installed on each side of the drum shaft, which consists of a static plate, a dynamic plate, a thrust bearing seat, a thrust bearing and an adjusting screw. The static plate on the right is equipped with a feed port, a drain port, a filter press port and a back-blowing port, and the feed port, drain port, filter press port and back-blowing port distributed on the dynamic plate are connected with the corresponding "cylindrical filter press unit" pipeline. The static plate is installed on the drum shaft through a bearing and fixed on the frame. The adjusting screw is used to adjust the gap between the dynamic plate and the static plate. The static plate on the left is equipped with a discharge port and a washing liquid inlet, and the discharge port and the washing liquid inlet distributed on the dynamic plate are connected with the corresponding "cylindrical filter press unit" pipeline. The static plate is installed on the drum shaft through a bearing and fixed on the frame. The adjusting screw is used to adjust the gap between the dynamic plate and the static plate. The inlet and outlet phases and corresponding angles of the distribution plates on the left and right sides of the drum shaft are equal.
5. A horizontal drum filter press according to claim 1, characterized in that: A plunger valve reducer is installed on the left side of the frame, and a torque overload clutch gear is installed on the reducer output shaft. The screw drives the reducer on the right side of the frame, and the screw reducer transmission gear. When the "cylinder filter press unit" is at the unloading D position of the drum, the plunger valve transmission gear meshes with the reducer torque overload clutch gear, and the screw transmission gear meshes with the screw reducer gear.