Double-station rotary multi-channel ceramic membrane carrier negative pressure coating device

Abstract

The invention discloses a double-station rotary multi-channel ceramic membrane carrier negative pressure coating device, and relates to the technical field of ceramic membrane preparation. The device comprises a rotatable double-station film fixing support, a negative pressure system and a circulating feeding system. The rotatable double-station film fixing support comprises a rotatable fixing frame, a supporting frame, a fixed supporting bearing, a pneumatic sealing clamp, a film carrier and a sealing cavity. The negative pressure system comprises a vacuum pump, a buffer tank and a pneumatic sealing chuck; the circulating feeding system comprises a feeding disc, a flexible pump and a vertical ball mill. According to the invention, the frame is driven to rotate by 180 degrees, so that the two stations simultaneously or alternately perform'upper negative pressure slurry suction coating 'and'inverted negative pressure residue discharge' operations, the parallel operation of coating and post-treatment is realized, the problems of uneven coating, low efficiency and slurry residue blockage of a large-volume multi-channel carrier are solved, and the production efficiency and the film layer quality are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ceramic membrane preparation, and particularly relates to a double-station rotary multi-channel ceramic membrane carrier negative pressure coating device. BACKGROUND

[0002] In the preparation of high-end ceramic separation membranes, catalytic membranes and solid oxide fuel cell components, the core technology is to prepare a uniform, defect-free and firmly combined functional membrane layer on a porous ceramic carrier. For large-volume carriers with complex multi-channel structures, such as multi-channel tubular and honeycomb bodies, traditional coating processes such as dipping and spraying have inherent defects: it is difficult to ensure uniform adhesion of the slurry to the inner walls of all channels, and there are problems such as low coating efficiency, easy settling of the slurry, and easy clogging of the channels by residual slurry after coating, which seriously affect the performance and yield of the membrane layer.

[0003] Although the existing single-station coating equipment can achieve a certain degree of negative pressure coating, the production efficiency is low and cannot meet the needs of large-scale production. In particular, for large-volume carriers, the amount of slurry required is large, and the uniformity and stability of the slurry during the coating process are crucial. In addition, the existing equipment usually lacks effective cleaning of residual slurry and reliable protection of the vacuum system, resulting in low yield and frequent equipment maintenance. SUMMARY

[0004] To solve the above technical problems, the application provides a double-station rotary multi-channel ceramic membrane carrier negative pressure coating device.

[0005] The application provides a double-station rotary multi-channel ceramic membrane carrier negative pressure coating device with high coating efficiency, good membrane layer uniformity, automatic removal of residual slurry and protection of the core vacuum equipment.

[0006] A double-station rotary multi-channel ceramic membrane carrier negative pressure coating device, comprising: a rotatable double-station membrane fixing support 1, a negative pressure system 2 and a circulating feeding system 3.

[0007] The rotatable double-station membrane fixing support 1 comprises a rotatable fixed frame 101, a support frame 102, a fixed support bearing 103, a pneumatic sealing clamp 104 and a membrane carrier and sealing cavity 105; the support frame 102 is fixed to the ground, the rotatable fixed frame 101 is installed on the support frame 102 through the fixed support bearing 103 and can rotate around a horizontal shaft; the membrane carrier and sealing cavity 105 and the pneumatic sealing clamp 104 are symmetrically arranged in the two stations at both ends of the rotatable fixed frame 101, and the pneumatic sealing clamp 104 is used for locking the membrane carrier and sealing cavity 105; the top of the membrane carrier and sealing cavity 105 is an air outlet, and the bottom is a feeding port;

[0008] The negative pressure system 2 comprises a vacuum pump 201, a buffer tank 202 and a pneumatic sealing chuck 203; the buffer tank 202 is connected in series on the air suction passage of the vacuum pump 201 and is selectively communicated with the air suction port of the membrane carrier and the sealing cavity 105 through the pneumatic sealing chuck 203 and pipelines;

[0009] The circulating feeding system 3 comprises a feeding disc 301, a flexible pump 302 and a vertical ball mill 303; the vertical ball mill 303 is respectively communicated with the feeding disc 301 and the flexible pump 302, the flexible pump 302 is further connected with the feeding disc 301 through pipelines, and the feeding disc 301 is communicated with the feeding port of the membrane carrier and the sealing cavity 105 in the coating station.

[0010] The working process of the double-station rotary multi-channel ceramic membrane carrier negative pressure coating device is as follows:

[0011] Initially, the rotatable fixed frame 101 is in a predetermined position, and it is assumed that one station is in the coating position (station A) and the other station is in the residual material discharging / preparation position (station B).

[0012] The coating process (station A): the carrier is loaded into the membrane carrier and the sealing cavity 105 in the station A and is closed, and the pneumatic sealing chuck 104 is locked. The negative pressure system 2 is started, the sealing cavity of the station A is vacuumized, under the driving of the pressure difference between the upper and lower carriers, the circulating feeding system 3 sends the uniform slurry to the top of the carrier. After a preset contact time, the negative pressure system is closed, and the slurry is uniformly sucked into the inner wall of all channels of the carrier, and the pre-coating of the membrane layer is completed.

[0013] Rotation and process switching: after the coating of the station A is completed, the rotatable fixed frame 101 is driven to rotate by 180 degrees. At this time, the station A is switched to the residual material discharging position, and the station B is switched to the coating position.

[0014] Parallel operation of the two stations:

[0015] Station B: repeat step 1 to start a new round of coating.

[0016] Station A: since the coated carrier has been inverted with the frame, the negative pressure system 2 again vacuums the sealing cavity thereof. The residual slurry in the channel is effectively sucked out under the dual action of gravity and negative pressure and is collected in the waste disc below. The buffer tank 202 protects the vacuum pump 201 in this process.

[0017] Continuous circulation production: after the coating of the station B is completed, the frame is rotated again to enter the next cycle. The operator can load and unload the carrier at the non-working side of the station, so that the parallel operation of coating, residual material discharging and loading and unloading is realized, and the production efficiency is doubled.

[0018] The beneficial effects of the present application are as follows:

[0019] One, high efficiency: unique double-station rotary design, realizes the parallel and automatic connection of coating, residual / drying process, the production efficiency is improved nearly one time compared with single-station equipment, especially suitable for batch production of large-size carriers.

[0020] Two, high quality: the circulating feeding system 3 of the vertical ball mill 303 fundamentally ensures the uniformity and stability of the slurry in the long-time coating operation, which is a prerequisite for obtaining high-performance and consistent film layers. The 180-degree rotary negative pressure residual removal process effectively removes the residual slurry in the channel, prevents hole blockage during drying, and improves the film layer integrity and yield.

[0021] Three, high reliability: the buffer tank 202 provides reliable protection for the vacuum pump 201, reduces the equipment failure rate and maintenance cost. The use of flexible pump 302 reduces the shear damage to particles in the slurry.

[0022] Four, high adaptability: the replaceable clamping plate design in the sealed cavity 105 enables the device to quickly adapt to ceramic membrane carriers of various shapes and sizes, with strong versatility. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 The main structure schematic diagram of the double-station rotary multi-channel ceramic membrane carrier negative pressure coating device described in the application;

[0024] Fig. 2 The schematic diagram of the rotatable double-station membrane fixing support;

[0025] Fig. 3 The schematic diagram of the negative pressure system;

[0026] Fig. 4 The schematic diagram of the circulating feeding system;

[0027] Fig. 5 The coating operation schematic diagram;

[0028] Fig. 6 The residual removal operation schematic diagram. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the application clearer, the embodiments of the application will be described in detail below with reference to the drawings.

[0030] Specific implementation one: a double-station rotary multi-channel ceramic membrane carrier negative pressure coating device, including: a rotatable double-station membrane fixing support 1, a negative pressure system 2 and a circulating feeding system 3;

[0031] The rotatable dual-station membrane fixing bracket 1 includes a rotatable fixing frame 101, a support frame 102, a fixed support bearing 103, a pneumatic sealing clamp 104, and a membrane carrier and sealing cavity 105. The support frame 102 is fixed to the ground, and the rotatable fixing frame 101 is mounted on the support frame 102 via the fixed support bearing 103 and can rotate around a horizontal axis. The membrane carrier and sealing cavity 105 and the pneumatic sealing clamp 104 are symmetrically arranged at two stations at both ends of the rotatable fixing frame 101. The pneumatic sealing clamp 104 is used to lock the membrane carrier and sealing cavity 105. The top of the membrane carrier and sealing cavity 105 is an air extraction port, and the bottom is a feed inlet.

[0032] The negative pressure system 2 includes a vacuum pump 201, a buffer tank 202, and a pneumatic sealing clamp 203; the buffer tank 202 is connected in series in the suction passage of the vacuum pump 201, and is selectively connected to the suction port of the membrane carrier and the sealing cavity 105 through the pneumatic sealing clamp 203 and the pipeline.

[0033] The circulating feeding system 3 includes a feeding tray 301, a flexible pump 302, and a vertical ball mill 303. The vertical ball mill 303 is connected to the feeding tray 301 and the flexible pump 302 respectively. The flexible pump 302 is also connected to the feeding tray 301 through a pipeline. The feeding tray 301 is connected to the inlet of the membrane carrier and the sealing cavity 105 at the coating station.

[0034] In this embodiment, the support frame 102 serves as the main skeleton of the device. Both membrane carriers and the sealing cavity 105 are composed of two openable and closable sealing half-cavities, forming a sealed space when closed. The half-cavities contain quickly replaceable clamps to accommodate ceramic membrane carriers of different shapes (column type, plate type, etc.). A pneumatic sealing clamp 104 is installed in the upper half-cavity to apply inward force during the coating process, pressing the sealing cavity and firmly fixing the carrier.

[0035] In this embodiment, the pneumatic sealing clamp 203 is used to achieve rapid sealing connection and disconnection between the pipeline and the upper cavity of the rotating frame. The buffer tank 202 is connected in series before the vacuum pump 201 to collect and temporarily store small amounts of slurry or slurry droplets that may be accidentally sucked in during coating and residue removal, effectively preventing them from entering the vacuum pump 201 and causing contamination and damage.

[0036] In this embodiment, the feeding tray 301 is used to store the coating slurry. The vertical ball mill 303 continuously and gently stirs and disperses the slurry through its internal grinding media, preventing particle sedimentation and agglomeration, and maintaining the high uniformity and stability of the slurry properties. The flexible pump 302 is used to pump out the uniform slurry processed by the vertical ball mill 303, and deliver it to the feeding tray 301 through pipelines and rotary joints, to the feeding port at the top of the membrane carrier and sealing cavity 105 at the coating station. This system forms a closed loop, ensuring that the slurry flows continuously in the coating gap and maintaining uniformity.

[0037] The embodiment rotates the frame by 180 degrees, so that the two stations simultaneously or alternately perform the "upper negative pressure suction coating" and "inverted negative pressure residual discharge" operations, realizes parallel operation of coating and post-processing, solves the problems of uneven coating, low efficiency and residual slurry blockage of large-volume multi-channel carriers, and significantly improves production efficiency and film layer quality.

[0038] Specific implementation method two: The difference between this embodiment and specific implementation method one is that the rotatable fixed frame 101 is driven by a driving mechanism to rotate by 180 degrees, so that the two stations are simultaneously or alternately in the coating station or the residual discharge / loading station. The other steps are the same as those of specific implementation method one.

[0039] Specific implementation method three: The difference between this embodiment and one of specific implementation methods one or two is that the membrane carrier and the sealed cavity 105 include openable and closable left and right sealed half cavities, and a replaceable clamping plate is arranged in the cavity, and the clamping plate has a positioning profile matched with the outer shape of the columnar or plate type ceramic membrane carrier. The other steps are the same as those of specific implementation methods one or two.

[0040] Specific implementation method four: The difference between this embodiment and one of specific implementation methods one to three is that the circulating feeding system 3 constitutes a slurry circulating loop, and when the membrane carrier and the sealed cavity 105 are not supplied with slurry, the slurry continuously circulates and flows in the feeding disc 301, the vertical ball mill 303, the flexible pump 302 and the connecting pipeline. The other steps are the same as those of specific implementation methods one to three.

[0041] Specific implementation method five: The difference between this embodiment and one of specific implementation methods one to four is that the bottom of the buffer tank 202 is provided with a valve emptying port. The other steps are the same as those of specific implementation methods one to four.

[0042] Specific implementation method six: The difference between this embodiment and one of specific implementation methods one to five is that it further includes an electric control system, which is electrically connected with the driving mechanism for driving the rotatable fixed frame 101, the pneumatic sealing clamp 104, the flexible pump 302, the vacuum pump 201 and the corresponding pneumatic valves, and is used for controlling the device to automatically operate the coating, rotating and residual discharge processes according to a preset program. The other steps are the same as those of specific implementation methods one to five.

[0043] Specific implementation method seven: The difference between this embodiment and one of specific implementation methods one to six is that the preset program includes: controlling the membrane carrier and the sealed cavity 105 in the coating station to perform negative pressure suction coating; after the coating is completed, controlling the rotatable fixed frame 101 to rotate by 180 degrees; then controlling the sealed cavity newly entering the coating station to perform coating, and controlling the sealed cavity turning into the residual discharge station to perform negative pressure residual discharge operation. The other steps are the same as those of specific implementation methods one to six.

[0044] Specific implementation eight: the difference between this embodiment and one of the specific implementations one to seven is that the flexible pump 302 is a hose pump. Other steps are the same as specific implementations one to seven.

[0045] The beneficial effects of the present application are verified by the following examples:

[0046] Example 1: combination Figs. 1-6 To illustrate this embodiment, the embodiment is a double-station rotary multi-channel ceramic membrane carrier negative pressure coating device, which comprises a rotatable double-station membrane fixing support 1, a negative pressure system 2, and a circulating feeding system 3.

[0047] The rotatable double-station membrane fixing support 1 comprises a rotatable fixing frame 101, a support frame 102, a fixing support bearing 103, a pneumatic sealing clamp 104, and a membrane carrier and sealing cavity 105. The support frame 102 is fixed to the ground, the rotatable fixing frame 101 is installed on the support frame 102 through the fixing support bearing 103, and is driven by a servo motor through a gear or a synchronous belt, and can be accurately rotated by 180 degrees. Two installation bases of the workstations are welded or bolted at both ends of the frame, and are used to install the membrane carrier and sealing cavity 105. The membrane carrier and sealing cavity 105 and the pneumatic sealing clamp 104 are symmetrically arranged at the two workstations at both ends of the rotatable fixing frame 101. The left and right half cavities of the membrane carrier and sealing cavity 105 are opened and closed through a pneumatic opening and closing mechanism (such as an air cylinder), and are locked and sealed by the pneumatic sealing clamp 104 after being closed. The cavity is provided with replaceable clamping blocks with silica gel sealing rings for clamping ceramic membrane carriers of different specifications. The top of the membrane carrier and sealing cavity 105 is an air outlet, and the bottom is a feeding port.

[0048] The negative pressure system 2 comprises a vacuum pump 201, a buffer tank 202, and a pneumatic sealing chuck 203. The buffer tank 202 is connected in series in the air suction path of the vacuum pump 201, and is selectively communicated with the air outlet of the membrane carrier and sealing cavity 105 through the pneumatic sealing chuck 203 and the pipeline. The bottom of the buffer tank 202 is provided with a venting port with a valve.

[0049] The circulating feeding system 3 comprises a feeding disc 301, a flexible pump 302, and a vertical ball mill 303. The vertical ball mill 303 is respectively communicated with the feeding disc 301 and the flexible pump 302. The flexible pump 302 is also connected to the feeding disc 301 through a pipeline. The feeding disc 301 is communicated with the feeding port of the membrane carrier and sealing cavity 105 in the coating station. When not coating, the slurry is continuously circulated at low speed in the feeding disc 301, the vertical ball mill 303, the flexible pump 302, and the pipeline.

[0050] Working process:

[0051] The operator loads two large volume multi-channel ceramic carriers into two station membrane carrier and seal cavities 105 and closes the lock. The equipment is started. Initially, the station of the rotatable fixed frame 101 is in the coating station. The vacuum system seals the top of the station through the pneumatic seal chuck 203, the vacuum pump 201 is turned on, and the seal cavity is in a negative pressure state. The slurry flows to the feeding tray 301 under the delivery of the flexible pump 302, and the slurry is sucked into the internal channel of the carrier. After the slurry fills the carrier or reaches the predetermined contact time, the feeding is stopped, the vacuum system is closed, and the slurry is discharged from the bottom by gravity to the tray. The operation frame is rotated by 180 degrees, station B is turned to the left to start coating, and station A is turned to the right to the residual discharge station. The negative pressure system switches to vacuumize station A to discharge the residual slurry. Such a cycle realizes continuous production. The operator can unload the carrier after coating at the right station and load a new carrier. The electric control system controls the timing, speed and pressure of all actions.

Claims

1. A double-station rotary multi-channel ceramic membrane carrier negative pressure coating device, characterized in that, The utility model relates to a kind of ceramic membrane coating device, including: Rotatable double-position film fixing support (1), negative pressure system (2) and circulating feeding system (3); The rotatable double-position film fixing support (1) includes rotatable fixed frame (101), support frame (102), fixed support bearing (103), pneumatic sealing clamp (104) and film carrier and sealing cavity (105);The support frame (102) is fixed to the ground, and the rotatable fixed frame (101) is installed on the support frame (102) by fixed support bearing (103) and can rotate around horizontal shaft;Film carrier and sealing cavity (105) and pneumatic sealing clamp (104) are symmetrically arranged in the two stations at both ends of rotatable fixed frame (101), and pneumatic sealing clamp (104) is used for locking film carrier and sealing cavity (105);The top of the film carrier and the sealing cavity (105) is a suction port, and the bottom is a feed inlet; The negative pressure system (2) includes vacuum pump (201), buffer tank (202) and pneumatic sealing chuck (203);The buffer tank (202) is connected in series in the air suction passage of the vacuum pump (201), and is selectively communicated with the suction port of the film carrier and the sealing cavity (105) by the pneumatic sealing chuck (203) and pipeline; The circulating feeding system (3) includes feeding disc (301), flexible pump (302) and vertical ball mill (303);The vertical ball mill (303) is communicated with the feeding disc (301) and the flexible pump (302) respectively, and the flexible pump (302) is also connected with the feeding disc (301) through pipeline, and the feeding disc (301) is communicated with the feed inlet of the film carrier and the sealing cavity (105) in the coating station.

2. The double-station rotary multi-channel ceramic membrane carrier negative pressure coating device according to claim 1, characterized in that, The rotatable fixed frame (101) is driven by a driving mechanism to rotate 180 degrees, so that the two stations are simultaneously or alternately in the coating station or the residual discharge / stowing station.

3. The double-station rotary multi-channel ceramic membrane carrier negative-pressure coating device according to claim 1, characterized in that, The film carrier and the sealing cavity (105) include openable and closable left and right sealing half cavities, and a replaceable clamp plate is arranged in the cavity, and the clamp plate has a positioning profile matched with the outer shape of the column type or plate type ceramic membrane carrier.

4. The double-station rotary multi-channel ceramic membrane carrier negative-pressure coating device according to claim 1, characterized in that, The circulating feeding system (3) forms a slurry circulating loop, and when no slurry is supplied to the film carrier and the sealing cavity (105), the slurry continuously circulates in the feeding disc (301), the vertical ball mill (303), the flexible pump (302) and the connecting pipeline.

5. The double-station rotary multi-channel ceramic membrane carrier negative-pressure coating device according to claim 1, characterized in that, The bottom of the buffer tank (202) is provided with a valve emptying port.

6. The double-station rotary multi-channel ceramic membrane carrier negative-pressure coating device according to claim 1, characterized in that, It also includes an electric control system, which is electrically connected with the driving mechanism for driving the rotatable fixed frame (101), the pneumatic sealing clamp (104), the flexible pump (302), the vacuum pump (201) and the corresponding pneumatic valve, for controlling the device to automatically operate coating, rotation and residual discharge according to a preset program.

7. The double-station rotary multi-channel ceramic membrane carrier negative-pressure coating device according to claim 6, characterized in that, The preset program includes: controlling the film carrier and the sealing cavity (105) in the coating station to perform negative pressure suction slurry coating;After coating, control the rotatable fixed frame (101) to rotate 180 degrees;Then control the sealing cavity newly entering the coating station to perform coating, and control the sealing cavity turning into the residual discharge station to perform negative pressure residual discharge operation.

8. The double-station rotary multi-channel ceramic membrane carrier negative-pressure coating device according to claim 1, characterized in that, The flexible pump (302) is a hose pump.

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