Slurry coating device and slurry coating method for corrugated plate type catalyst

Abstract

The invention relates to a slurry coating device and method for a corrugated plate type catalyst. The device comprises a bearing frame, a first weighing unit, a coating suction cavity, a feeding unit, a suction unit, a second weighing unit and a transferring unit, and the bearing frame is used for loading the corrugated plate type catalyst; the first weighing unit is used for weighing the corrugated plate type catalyst; the coating suction cavity is used for accommodating a corrugated plate type catalyst, and a pressure sensor is arranged in the coating suction cavity; the feeding unit is used for conveying slurry into the coating suction cavity; a flow meter is arranged on a pipeline for communicating the feeding unit with the coating suction cavity; the suction unit is communicated with the coating suction cavity; the second weighing unit is used for weighing the corrugated plate type catalyst; and the transfer unit is used for transferring the corrugated plate type catalyst to the coating suction cavity or away from the coating suction cavity. According to the slurry coating device for the corrugated plate type catalyst, the coating uniformity and quality of the slurry of the corrugated plate type catalyst can be accurately controlled.

Description

Technical Field

[0001] The invention belongs to the field of corrugated plate type catalyst preparation, and in particular relates to a slurry coating device and a slurry coating method for a corrugated plate type catalyst. Background Art

[0002] The coating of the active ingredients of the catalyst is an important technical step in the preparation process of the catalyst. Conventional coating adopts the impregnation method, and the carrier is often directly immersed in the slurry for preparation.

[0003] At present, the coating requirements of catalyst carriers generally use a zoned coating method, which can effectively utilize the carrier space and apply different active coatings according to the changes in the exhaust gas components in the stage chemical reaction stage, so that the carrier catalytic performance is more targeted and the precious metal utilization rate is higher, thereby saving the amount of precious metals. However, the existing technical solutions were mostly submitted and released more than ten years ago, and they no longer meet the current latest catalysts, especially the catalyst coating technology requirements of the National VI Standard. For example, patent US2012 / 0315381A1CoatingDeviceandMethod also uses a coating chamber (Coatingdevice122), a coating valve (Extractionvalve137), a bypass pipe (RiserTube127) and several sensors for detection. The slurry is delivered into the coating chamber by a slurry pump (DeliveryPumpforCoatingMedium135), and the catalyst carrier is placed on several probes in the coating chamber (Sensorsforth elevel123), feeding starts after the air ring is clamped, and coating stops after being detected by the sensor (Sensros126a / 126b / 126c / 126d). The coating valve opens to extract excess slurry to complete the coating process. This coating process of bottom feeding and bottom suction has been a traditional process for catalyst coating for decades. With the implementation of my country's National VI tail gas emission standards and industrial volatile organic waste gas treatment standards, the requirements for automation, precision, reliability and product performance of catalyst production have risen to new heights. This patent is technically unable to meet the use requirements.

[0004] The volume of a single corrugated plate catalyst carrier is relatively large, which is dozens of times that of ordinary cordierite carriers (for example, 150*150*150mm or 100*100*100mm); the weight is relatively large, about 30kg per piece, while ordinary cordierite carriers are less than 2kg; because the entire piece is not sealed on all sides, the coating process of ordinary cordierite carriers cannot be used.

[0005] The preparation process of the corrugated plate catalyst is as follows: a thin metal plate or a glass fiber plate is pre-pressed into a corrugated plate shape and then cut into uniform dimensions, and then several layers of corrugated plates are stacked to form a catalyst carrier with vertically connected channels.

[0006] Compared with cordierite-supported catalysts, the single-piece size of the corrugated plate catalyst is larger, the weight is lighter, the cost is lower under the same volume conditions, the back pressure is low, the surface area involved in the catalytic reaction is larger, and a larger circulating gas velocity can be used while the airflow resistance and catalytic performance are not significantly attenuated, thereby significantly reducing the overall catalyst loading volume and weight, as well as reducing the cost of using the catalyst.

[0007] The existing corrugated plate catalyst carrier adopts an immersion coating process, that is, the whole piece is immersed in the slurry, then taken out and left to stand, and then the air is blown through the channels. This process has low efficiency, high energy consumption, and a lot of slurry waste. In addition, for carriers with a height of more than 200 mm, the traditional immersion process may result in no coating inside. Alternatively, it is necessary to use a slurry with a lower viscosity for immersion (the slurry with low viscosity has good fluidity and can enter all the channels). The low viscosity will result in a relatively low active component of the slurry attached to the surface of the carrier, and the catalyst performance will be lower. Summary of the invention

[0008] The object of the present invention is to provide a slurry coating device and a slurry coating method for a corrugated plate type catalyst.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A slurry coating device for a corrugated plate type catalyst, comprising:

[0011] A carrying frame, the carrying frame is used to load the corrugated plate catalyst, the upper side and the lower side of the carrying frame are both provided with openings, a supporting part for supporting the corrugated plate catalyst is arranged in the carrying frame, the supporting part is provided with an opening, and the opening is connected with the space in the carrying frame;

[0012] A first weighing unit, wherein the first weighing unit is used to weigh the initial corrugated plate catalyst;

[0013] A coating suction chamber, wherein the coating suction chamber is used to accommodate an initial corrugated plate catalyst, and a pressure sensor is disposed in the coating suction chamber;

[0014] A feeding unit, the feeding unit is connected to the coating suction chamber, and is used to transport slurry into the coating suction chamber, so that the initial corrugated plate catalyst coating slurry located on the coating suction chamber; a flow meter is provided on the pipeline connecting the feeding unit and the coating suction chamber;

[0015] A suction unit, the suction unit is connected to the coating suction chamber, and the suction unit is used to evacuate the coating suction chamber and to suck the slurry in the coating suction chamber and the corrugated plate catalyst;

[0016] a second weighing unit, the second weighing unit being used to weigh the corrugated plate catalyst separated from the coating suction chamber;

[0017] A stationary unit, the stationary unit is used to place the corrugated plate catalyst weighed by the second weighing unit;

[0018] The transfer unit is used to grab the corrugated plate catalyst and transfer the corrugated plate catalyst to the coating suction chamber, and transfer the corrugated plate catalyst on the coating suction chamber to the static unit.

[0019] According to some embodiments of the present invention, the transfer unit includes a clamping member, a pressure cover and a driving member, the clamping member is used to grab the supporting frame; the driving member is connected to the pressure cover and is used to drive the pressure cover to move in a vertical direction, when the clamping member clamps the supporting frame, the pressure cover is located above the upper opening of the supporting frame and directly above the corrugated plate catalyst.

[0020] According to some embodiments of the present invention, the device also includes a suction chamber, which is arranged adjacent to the coating suction chamber, and the suction chamber is located on the right side of the coating suction chamber. The suction unit is connected to the suction chamber, and the suction unit is used to vacuum the suction chamber and suck the slurry in the corrugated plate catalyst in the suction chamber.

[0021] According to some implementation aspects of the present invention, the coating suction chamber comprises a first cavity and a second cavity, the first cavity is located above the second cavity, and the first cavity and the second cavity are connected through a coating suction valve;

[0022] The suction chamber comprises a third chamber and a fourth chamber, the third chamber is located above the fourth chamber, and the third chamber and the fourth chamber are connected via a suction valve.

[0023] According to some embodiments of the present invention, the suction unit includes a first vacuum pipeline, a vacuum pump, and a second vacuum pipeline. The first vacuum pipeline is connected to the coating suction chamber, the vacuum pump is arranged in the first vacuum pipeline, one end of the second vacuum pipeline is connected to the first vacuum pipeline, and the other end of the second vacuum pipeline is connected to the suction chamber.

[0024] According to some implementation aspects of the present invention, a first vacuum control valve is provided on the first vacuum pipeline, and a second vacuum control valve is provided on the second vacuum pipeline.

[0025] According to some embodiments of the present invention, the suction unit also includes a first slurry recovery pipeline and a second slurry recovery pipeline, one end of the first slurry recovery pipeline is connected to the coating suction chamber, the other end of the first slurry recovery pipeline is connected to the second slurry recovery pipeline, one end of the second slurry recovery pipeline is connected to the suction chamber, and the other end of the second slurry recovery pipeline is connected to the feeding unit.

[0026] According to some embodiments of the present invention, the feeding unit includes a slurry storage tank, a slurry delivery pipeline, and a slurry delivery pump. The slurry storage tank is connected to the coating suction chamber through the slurry delivery pipeline. The slurry delivery pipeline is provided with a slurry delivery pump and a flow meter.

[0027] According to some implementation aspects of the present invention, the device further comprises a regulating pipeline, one end of the regulating pipeline is connected to the slurry storage tank, the other end of the regulating pipeline is connected to the slurry conveying pipeline, and a pressure regulating valve is arranged on the regulating pipeline.

[0028] According to some embodiments of the present invention, the device further comprises a drying unit and a cooling unit. The drying unit is used to dry the corrugated plate catalyst after being allowed to stand by the standing unit; the cooling unit is used to cool the dried corrugated plate catalyst.

[0029] Another technical solution adopted by the present invention is:

[0030] A coating method based on the slurry coating device of the corrugated plate type catalyst comprises:

[0031] S1, the corrugated plate catalyst is contained in the carrying frame, and the transfer unit transfers the carrying frame and the corrugated plate catalyst to the first weighing unit, and the first weighing unit measures the mass M1 of the carrying frame and the corrugated plate catalyst not coated with slurry;

[0032] S2, the transfer unit transfers the corrugated plate catalyst to the coating suction chamber and fixes and seals it;

[0033] S3, the feeding unit delivers slurry to the coating suction chamber, and the feeding speed is adjusted by the flow meter and the pressure sensor. When the slurry coating height in the corrugated plate catalyst is within the height setting range and the pressure in the coating suction chamber is within the pressure setting range, the slurry delivery is stopped;

[0034] S4, operating the suction unit to make the coating suction chamber reach a set vacuum degree, and using a large flow and high vacuum degree method to suck away the excess slurry in the coating suction chamber and the corrugated plate catalyst holes;

[0035] S5, the transfer unit transfers the corrugated plate catalyst to the second weighing unit, and the second weighing unit measures the mass M2 of the coated corrugated plate catalyst;

[0036] S6. Determine whether the difference between M2 and M1 is within the preset range. If so, place the corrugated plate catalyst at rest, dry and cool. If the difference between M2 and M1 is higher than the preset range, repeat steps S4-S5. If the difference between M2 and M1 is lower than the preset range, repeat steps S3-S5.

[0037] According to some implementation aspects of the present invention, in step S3, when the slurry coating height H in the corrugated plate catalyst is 理 With coating setting height H 设 The difference △H is greater than the height threshold, and when the theoretical pressure P in the coating suction chamber 理 The measured actual pressure P 实 When the absolute value of the difference |△P| is less than the pressure threshold, the slurry delivery is stopped, where:

[0038] Theoretical coating height H of slurry in corrugated plate catalyst 理 Obtained by the following formula:

[0039] H 理 =(V all -V1) / (a*b*θ),

[0040] Among them, V all is the cumulative flow of the flow meter after the start of feeding, a is the length of the carrier frame, b is the width of the carrier frame, V1 is the volume of the first cavity of the coating cavity, and θ is the porosity of the pores of the corrugated plate catalyst;

[0041] The theoretical pressure P in the coating cavity is obtained by the following formula:

[0042] P 理 =10*(H 理 +h)*d,

[0043] Among them, H 理 is the theoretical coating height of the corrugated plate catalyst, h is the distance between the pressure sensor in the coating suction chamber and the lowermost end of the corrugated plate catalyst, and d is the slurry density.

[0044] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0045] The slurry coating device for the corrugated plate catalyst of the present invention is convenient for coating the corrugated plate catalyst with slurry by arranging a bearing frame to accommodate the corrugated plate catalyst; the slurry is introduced into the lower part of the corrugated plate catalyst, the flow rate of the coating slurry is controlled by a flow meter, and the pressure in the coating suction chamber during the coating process is detected by a pressure sensor, so as to achieve the slurry uniformity in each channel of the corrugated plate catalyst. Whether the quantitative coating has been completed is determined by the first weighing unit and the second weighing unit, so that the slurry coating height, quality and uniformity in the corrugated plate catalyst can be accurately controlled, and the excess slurry in the coating suction chamber and the corrugated plate catalyst can be extracted by the suction unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Attached Figure 1 It is a structural diagram of a slurry coating device for a corrugated plate type catalyst of the present invention;

[0047] Attached Figure 2 This is a structural diagram of the transfer unit of the slurry coating device of the corrugated plate type catalyst of the present invention without clamping the carrying frame;

[0048] Attached Figure 3 It is a structural diagram of a transfer unit clamping a carrying frame of a slurry coating device for a corrugated plate type catalyst of the present invention;

[0049] Attached Figure 4 It is a cross-sectional view of the transfer unit of the slurry coating device of the corrugated plate type catalyst of the present invention without clamping the carrying frame;

[0050] Attached Figure 5 It is a cross-sectional view of a transfer unit clamping a carrying frame of a slurry coating device for a corrugated plate type catalyst of the present invention;

[0051] Attached Figure 6 The graph of the theoretical coating height of the slurry of the corrugated plate catalyst of the comparative example and the pressure in the coating support frame (constant feed rate);

[0052] Attached Figure 7 It is a curve diagram of the theoretical coating height of the slurry of the corrugated plate catalyst in the supporting frame of the embodiment and the pressure in the coating supporting frame (the slurry feeding speed is reduced step by step);

[0053] Attached Figure 8 is a slurry feed control flow chart of an embodiment;

[0054] Attached Fig. 9 It is a structural diagram of a corrugated plate catalyst;

[0055] Attached Fig.10 is a structural diagram of an existing cordierite-supported catalyst;

[0056] In the above attached figure:

[0057] 1-corrugated plate catalyst; 2-first weighing unit;

[0058] 3-transfer unit; 301-pressing cover, 302-fixing plate, 303-claw-shaped rod, 304-roller, 305-connecting rod, 306-driving member, 307-universal joint;

[0059] 4-second cavity; 5-fourth cavity; 6-second weighing unit; 8-control system; 9-vacuum pump; 10-first vacuum control valve; 11-second vacuum control valve; 12-coating suction valve; 13-suction valve; 14-first return valve; 15-second return valve; 16-viewing lens; 17-slurry delivery valve; 18-slurry delivery pump; 19-flow meter; 20-pressure regulating valve; 21-slurry storage tank; 22-first cavity; 23-fourth cavity Three chambers; 24-sight glass barrel feed valve; 25-sight glass barrel discharge valve; 26-adjusting pipeline; 27-slurry delivery pipeline; 28-second vacuum pipeline; 29-first vacuum pipeline; 31-pressure sensor; 32-stationary chamber; 33-pre-drying heating chamber; 34-final drying heating chamber; 35-cooling chamber; 36-slurry recovery container; 37-first slurry recovery pipeline, 38-second slurry recovery pipeline; 39-carrying frame; 40-limiting ring. DETAILED DESCRIPTION

[0060] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0061] Example 1

[0062] See also Figures 1 to 5 The slurry coating device of the corrugated plate catalyst shown includes a carrying frame 39, a first weighing unit 2, a coating suction chamber, a suction chamber, a feeding unit, a suction unit, a second weighing unit 6, a transfer unit 3, and a stationary unit, wherein:

[0063] The corrugated plate catalyst 1 is not sealed on all sides, and is loaded through a supporting frame 39, which facilitates slurry coating of the carrier corrugated plate catalyst 1 and ensures coating accuracy and uniformity. Openings are provided on the upper and lower sides of the supporting frame 39, and a supporting portion for supporting the corrugated plate catalyst is provided in the supporting frame. An opening is provided on the supporting portion, and the opening is connected with the space in the supporting frame. The supporting portion may be mesh-shaped, and the outer periphery of the supporting portion and the inner periphery of the supporting frame may be welded; the corrugated plate catalyst 1 enters the supporting frame 39 from the upper opening of the supporting frame 39 and is located on the supporting portion.

[0064] The coating suction chamber is used to accommodate the initial corrugated plate catalyst; the feeding unit is connected to the coating suction chamber, and the feeding unit is used to transport slurry into the coating suction chamber to coat the initial corrugated plate catalyst located on the coating suction chamber with slurry; the suction unit is connected to the coating suction chamber, and the suction unit is used to vacuum the coating suction chamber and suck the slurry in the coating suction chamber and the corrugated plate catalyst.

[0065] The coating suction chamber of this example includes a first cavity 22 and a second cavity 4. The first cavity 22 is located above the second cavity 4. The first cavity 22 and the second cavity 4 are connected through a coating suction valve 12. The corrugated plate catalyst to be coated with slurry is placed on the first cavity 22. The upper part of the first cavity 22 is square and consistent with the outer dimensions of the corrugated plate catalyst carrier. The lower part of the first cavity 22 is conical (the lower diameter gradually decreases from top to bottom) and is connected to the second cavity 4.

[0066] The pressure sensor 31 is disposed in the first cavity 22 of the coating suction cavity, and is used to detect the pressure in the first cavity 22 to control the coating uniformity of the slurry in each channel of the corrugated plate catalyst during the feeding process.

[0067] The device also includes a suction chamber, which is located on the right side of the coating suction chamber. The suction unit is connected to the suction chamber, and the suction unit is used to evacuate the suction chamber and suck the slurry in the corrugated plate catalyst in the suction chamber. The suction chamber includes a third cavity 23 and a fourth cavity 5, and the third cavity 23 is located above the fourth cavity 5. The third cavity 23 and the fourth cavity 5 are connected through a suction valve 13. When coating the slurry, the corrugated plate catalyst is first placed on the coating suction chamber. After the slurry is coated, the transfer unit 3 transfers the corrugated plate catalyst to the suction chamber (without slurry coating), and the excess slurry in the corrugated plate catalyst placed on the suction chamber is sucked out by the suction unit to ensure the coating accuracy.

[0068] In this example, the coating suction chamber and the suction chamber are provided, which can realize continuous production, improve production efficiency, and control the slurry coating results more stably.

[0069] The device of this example also includes a viewing lens barrel 16, which is connected to the coating suction chamber, see Figure 1 The sight glass barrel 16 is connected to both the first cavity 22 and the second cavity 4, specifically through a three-way pipe. The pipeline connecting the sight glass barrel 16 and the first cavity 22 is provided with a sight glass barrel feed valve 24, and the pipeline connecting the sight glass barrel 16 and the second cavity 4 is provided with a sight glass barrel discharge valve 25. When the corrugated plate catalyst is fixed on the first cavity 22, during the coating process, the sight glass barrel discharge valve 25 is closed and the sight glass barrel feed valve 24 is opened. During the suction process, the sight glass barrel discharge valve 25 is opened and the sight glass barrel feed valve 24 is closed. Through the setting of the sight glass barrel, the coating condition of the slurry in the corrugated plate catalyst can be observed more intuitively.

[0070] The first weighing unit 2 is used to weigh the initial corrugated plate catalyst; the second weighing unit 6 is used to weigh the corrugated plate catalyst that has left the suction chamber. On the coating suction chamber, the initial corrugated plate catalyst coating slurry located on the coating suction chamber is subjected to the first suction, and then transferred to the suction chamber for the second suction. The second weighing unit 6 weighs the corrugated plate catalyst that has left the suction chamber. By comparing the two weighing data, the quality of the corrugated plate catalyst coating slurry can be determined.

[0071] In this example, a placing table for accommodating the supporting frame is provided on the first cavity 22 and the third cavity 23. A sealing ring is provided on the placing table. When the supporting frame is placed on the placing table, the sealing ring can be inflated. After the sealing ring is inflated, the corrugated plate catalyst is clamped. After the suction is completed, the corrugated plate catalyst is released and then taken away by the transfer unit.

[0072] In some embodiments, the suction unit includes a first vacuum pipeline 29, a vacuum pump 9, and a second vacuum pipeline 28. The first vacuum pipeline 29 is connected to the second cavity 4 of the coating suction cavity, the vacuum pump 9 is arranged in the first vacuum pipeline 29, and a first vacuum control valve 10 is arranged on the first vacuum pipeline 29; one end of the second vacuum pipeline 28 is connected to the first vacuum pipeline 29, and the other end of the second vacuum pipeline 28 is connected to the fourth cavity 5 of the suction cavity, and a second vacuum control valve 11 is arranged on the second vacuum pipeline 28.

[0073] The suction unit also includes a first slurry recovery pipeline 37 and a second slurry recovery pipeline 38. One end of the first slurry recovery pipeline 37 is connected to the coating suction chamber, and the other end of the first slurry recovery pipeline 37 is connected to the second slurry recovery pipeline 38. One end of the second slurry recovery pipeline 38 is connected to the suction chamber, and the other end of the second slurry recovery pipeline 38 is connected to the slurry storage tank 21 of the feeding unit.

[0074] The feeding unit includes a slurry storage tank 21, a slurry delivery pipeline 27, a slurry delivery pump 18, and a slurry delivery valve 17. The slurry storage tank 21 is used to store slurry. The slurry storage tank 21 is connected to the coating suction chamber through the slurry delivery pipeline 27. The slurry delivery pipeline 27 is provided with a slurry delivery pump 18, a flow meter 19, and a slurry delivery valve 17. The flow meter 19 is used to measure the injected slurry, and the slurry delivery valve 17 controls the slurry flow rate.

[0075] The second cavity 4 of the coating suction cavity is connected to the slurry storage tank 21 through a first slurry recovery pipeline 37, on which a first return valve 14 is provided; the second cavity 4 of the suction cavity is connected to the slurry storage tank 21 through a second slurry recovery pipeline 38, on which a second return valve 15 is provided.

[0076] The device also includes a regulating pipeline 26, one end of which is connected to the slurry storage tank 21, and the other end of the regulating pipeline 26 is connected to the slurry conveying pipeline 27 (the other end of the regulating pipeline 26 is connected to the portion between the slurry conveying pump 18 and the flow meter 19 arranged on the slurry conveying pipeline 27). A pressure regulating valve 20 is arranged on the regulating pipeline 26 for adjusting the feed pressure in the slurry conveying pipeline 27.

[0077] When the slurry is delivered to the first cavity 22 of the coating suction chamber, the coating suction valve 12 is closed, and the slurry delivery valve 17 is opened, so that the slurry quickly fills the first cavity 22 and fills into the corrugated plate catalyst and the sight glass tube 16 .

[0078] The transfer unit 3 is used to grab the corrugated plate catalyst and transfer the corrugated plate catalyst to the coating suction chamber or away from the coating suction chamber, or the transfer unit 3 is used to grab the corrugated plate catalyst and transfer the corrugated plate catalyst to the suction chamber or away from the suction chamber. A plurality of transfer units 3 can be provided, such as two, and the two transfer units 3 correspond to the coating suction chamber and the suction chamber one by one.

[0079] Preferably, the transfer unit 3 includes a clamping member, a pressure cover 301 and a driving member 306. The clamping member is used to grab the supporting frame 39; the driving member 306 is connected to the pressure cover 301 to drive the pressure cover 301 to move in the vertical direction. When the clamping member clamps the supporting frame 39, the pressure cover 301 is located above the upper opening of the supporting frame 39 and directly above the corrugated plate catalyst.

[0080] See also Figure 2-5 A limiting ring 40 is arranged on the outer periphery of the carrying frame 39 , and the limiting ring 40 is arranged around the outer periphery of the carrying frame 39 . If the cross section of the carrying frame 39 is square, the limiting ring 40 is a square ring.

[0081] The clamping member includes a fixed plate 302 and a plurality of clamping units. The fixed plate 302 is located above the gland 301. The driving member 306 is connected to the fixed plate 302. The driving shaft of the driving member 306 is connected to the gland 301 through a universal joint 307. The driving member 306 can be a telescopic cylinder, and the driving shaft of the telescopic cylinder is connected to the gland 301 through a universal joint 307.

[0082] One end of the clamping unit is rotatably connected to the fixed plate 302, and the other end extends away from the fixed plate 302. The surrounding of the pressure cover 301 is connected to the clamping unit through the connecting rod 305, so that the pressure cover 301 is movably connected to the clamping unit. The clamping unit includes two claw-shaped rods 303, one end of the claw-shaped rods 303 is rotatably connected to the fixed plate 302, and the other end of the claw-shaped rods 303 (the end of the two claw-shaped rods 303 away from the fixed plate 302) is used to abut against the supporting frame, and a roller 304 is provided at the other end of the claw-shaped rod 303. The middle part of the claw-shaped rod 303 is connected to the pressure cover 301 through a connecting rod 305 (one end of the connecting rod 305 is rotatably connected to the middle part of the claw-shaped rod 303, and the other end of the connecting rod 305 is rotatably connected to the pressure cover 301). The roller 304 is located on the inner side of the claw-shaped rod 303 so that the roller 304 abuts against the limiting ring 40. The contact and movement of the roller 304 and the supporting frame 39 or the limiting ring 40 are all rolling, which can reduce wear.

[0083] The specific implementation of the transfer unit 3 is as follows: when the driving shaft of the driving member 306 retracts, the pressure cover 301 rises, the connecting rod 305 drives the clamping unit to flip outward, the clamping unit opens, and the supporting frame 39 is released; when the driving shaft of the driving member 306 extends, the pressure cover 301 descends, and the connecting rod 305 drives the clamping unit to retract to clamp the supporting frame 39. At this time, the pressure cover 301 is located above the supporting frame, and the lower surface of the pressure cover 301 can be flush with the upper surface of the supporting frame 39, and the pressure cover 301 does not extend into the supporting frame 39.

[0084] In this example, four clamping units are provided, two of which are arranged opposite to each other, and the other two are arranged opposite to each other. The four clamping units clamp the four sides of the bearing frame 39 respectively, and the clamping is more firm and stable.

[0085] Since the entire corrugated plate catalyst 1 has a square cross section, the airflow will be unevenly distributed during suction, with large airflow in the middle of the cross section and small airflow on the four sides. When the transfer unit transfers the carrier frame and the corrugated plate catalyst 1 to the coating suction chamber, the pressure cover 301 moves down to the upper opening of the carrier frame 39 and blocks the airflow in the middle cross section, leaving only the gap channel between the outer periphery of the pressure cover 301 and the inner side of the carrier frame 39. At this time, suction is only applied to the channels on the four sides of the corrugated plate catalyst.

[0086] The standing unit is used to place the corrugated plate catalyst weighed by the second weighing unit 6, and stand it to wait for the slurry to settle. The temperature during the standing is 20-35° C. and the time is 3-15 minutes.

[0087] See also Figure 1The static unit includes a static chamber 32. During the static process, normal temperature wind or cold wind (temperature is 20-35°C) is used to blow upward from the bottom of the corrugated plate catalyst to prevent the slurry coating from cracking or falling off. During the static process, a small amount of slurry drips from the bottom of the corrugated plate catalyst, and the static chamber 32 is connected with the slurry recovery container 36, and the slurry is uniformly collected in the slurry recovery container 36. The advantages of setting up a static unit are: using normal temperature wind or cold wind to remove excess slurry on the corrugated plate catalyst; if it is directly dried, such as using a higher temperature hot air to blow the corrugated plate catalyst weighed by the second weighing unit, the surface of the slurry will dry, and the slurry at the bottom of the corrugated plate catalyst will dry slowly, which is easy to cause the surface slurry to crack.

[0088] The device of this example also includes a drying unit and a cooling unit. The drying unit is used to dry the corrugated plate catalyst after being placed in the stationary unit. The drying unit includes a pre-drying unit and a final drying unit. The pre-drying unit includes a pre-drying heating chamber 33. A large flow of hot air is introduced into the bottom of the pre-drying heating chamber 33. The hot air is set at 60-100°C. The hot air passes through the pores of the corrugated plate catalyst to take away a large amount of moisture in the slurry. The final drying unit includes a final drying heating chamber 34. The preheated corrugated plate catalyst is placed in the final drying heating chamber 34. A certain flow of hot air is introduced into the bottom of the final drying heating chamber 34. The hot air is set at 120-160°C. The hot air passes through the pores of the corrugated plate catalyst to take away the residual slurry moisture. Among them, a part of the hot air discharged from the top of the final drying heating chamber 34 returns to the bottom of the pre-drying heating chamber 33, is mixed with the fresh air and heated again to the pre-drying set temperature, and is recycled to save heating energy consumption; a small part of the hot air discharged from the top of the final drying heating chamber 34 is discharged from the production equipment.

[0089] Preferably, a plurality of final drying and heating chambers 34 can be provided, so that the pre-dried corrugated plate catalyst can pass through a plurality of final drying and heating chambers 34 in sequence to ensure the quality of the coating slurry.

[0090] The cooling unit is used to cool the dried corrugated plate catalyst. The cooling unit includes a cooling chamber 35. The dried corrugated plate catalyst is placed in the cooling chamber 35, and a large flow of normal temperature air is introduced to take away the heat on the outer surface of the corrugated plate catalyst, thereby reducing the temperature of the outer surface of the corrugated plate catalyst to facilitate transportation in later production, thereby completing the entire coating process.

[0091] The hot air in the pre-drying heating chamber 33 and the final drying heating chamber 34 of this example can be passed through the outer surface and pores of the corrugated plate catalyst from top to bottom or from bottom to top, taking away a large amount of moisture in the slurry to achieve the drying process. The fresh air in the cooling chamber 35 can be passed through the outer surface and pores of the corrugated plate catalyst from top to bottom or from bottom to top to cool down.

[0092] The static chamber 32 of this example is preferably connected to the cooling chamber 35, and the hot air flowing out of the cooling chamber 35 enters the static chamber 32, which can save energy. A plurality of final drying and heating chambers 34 can be provided, and the residence time of each corrugated plate catalyst in each final drying and heating chamber can be equal, so as to realize the continuous production of the supported catalyst.

[0093] Example 2

[0094] A coating method based on a slurry coating device of a corrugated plate type catalyst, comprising:

[0095] S1, the corrugated plate catalyst is contained in the carrying frame, and the transfer unit 3 transfers the carrying frame and the corrugated plate catalyst to the first weighing unit 2, and the first weighing unit 2 measures the mass M1 of the carrying frame and the corrugated plate catalyst not coated with slurry;

[0096] S2, the transfer unit 3 transfers the corrugated plate catalyst to the coating suction chamber and fixes and seals it;

[0097] S3, the feeding unit transports the slurry to the coating suction chamber. When the slurry coating height H in the corrugated plate catalyst is 理 With coating setting height H 设 When the difference △H is greater than the height threshold, and when the theoretical pressure P in the coating suction chamber 理 The measured actual pressure P 实 When the absolute value of the difference |△P| is less than the pressure threshold, the feeding condition is met, the feeding is completed, and the slurry transportation is stopped; if one of the conditions is not met, the feeding is not completed;

[0098] Specifically:

[0099] The theoretical coating height H of the slurry in the corrugated plate catalyst is obtained by the accumulated flow through the flow meter after the feed starts. 理 , and then calculate the theoretical pressure P in the coating suction chamber 理 , then calculate the theoretical coating height H 理 Set coating height H 设 The difference △H (height of corrugated plate catalyst) is used to calculate the theoretical pressure P 理 The actual pressure P 实 The difference △P, and then take the absolute value |△P|.

[0100] Theoretical coating height H of slurry in corrugated plate catalyst 理 Obtained by the following formula:

[0101] H 理 =(V all -V1) / (a*b*θ),

[0102] Among them, V allis the cumulative flow of the flow meter after the start of feeding, a is the length of the supporting frame, b is the width of the supporting frame, V1 is the volume of the first cavity of the coating cavity, and θ is the porosity of the pores of the corrugated plate catalyst.

[0103] Theoretical pressure in the coating cavity (pressure in the first cavity) P 理 Obtained by the following formula:

[0104] P 理 =10*(H 理 +h)*d,

[0105] Among them, H 理 is the theoretical coating height of the corrugated plate catalyst, h is the distance between the pressure sensor in the coating suction chamber and the lowermost end of the corrugated plate catalyst, and d is the slurry density.

[0106] Specific examples are as follows:

[0107] The length (a) and width (b) of the carrier placement frame are 465mm*465mm, the height of the corrugated plate catalyst itself is 0.5 meters, the porosity θ is 85%, and the net volume V1=0.01m 3 , the currently measured cumulative flow V all =0.1m 3 , then the theoretical coating height H of the current corrugated plate catalyst 理 Obtained by the following formula.

[0108] H 理 =(V all -V1) / (a*b*θ)=(0.1-0.01) / (0.465*0.465*0.85)=0.489m.

[0109] The theoretical coating height of the corrugated plate catalyst calculated quickly by the cumulative flow is 0.489 meters. When the distance h between the pressure sensor in the coating chamber and the lowest end of the corrugated plate catalyst is 0.1 meters, the slurry density d is 1.25 kg / m 3 , the corresponding theoretical pressure in the coating suction chamber is P 理 It is obtained by the following formula. 理 =10*(H 理 +0.1)*1.25=7.36Kpa.

[0110] When coating setting height H 设 When the height of the carrier is 0.5 m,

[0111] △H=H 理 -0.5 = 0.489 - 0.5 = -0.011;

[0112] |△P|=|P 理-P 实 |=|7.36-P 实 |;

[0113] Among them, P 实 Obtained from the pressure sensor.

[0114] In some embodiments, the height threshold is set to 0.01 meters and the pressure threshold is set to 1 kPa.

[0115] When coating the feed, the slurry is fed into the first cavity 22 of the coating suction cavity through the slurry feeding pipeline 27 by the slurry feeding pump 18, and gradually and slowly fed into the corrugated plate catalyst from bottom to top. 理 The value gradually increases from a negative value to a positive value, and the △H value gradually increases from a negative value. When the coating is completed, △H is a positive value and is greater than the height threshold; P 理 The value increases gradually from 0.

[0116] The specific implementation method of slurry coating using the slurry coating device of the corrugated plate type catalyst of this example is as follows:

[0117] When the coating feed is started at the initial constant feed flow rate, △H is less than 0, and |△P| is less than the set pressure threshold, and the feeding is continued. When |△P| is greater than the set pressure threshold, the feeding is suspended for a period of time (1-5s, preferably 3s), and then the feeding speed is reduced (reduced to 30-60% of the initial constant feed flow rate, preferably 50%, and the reduced feed flow rate is a). At this time, |△P| will decrease until it is less than the pressure threshold, and the feeding is continued. If △H is less than 0 and |△P| is greater than the set pressure threshold, the feeding is suspended again for a short period of time (1-5s, preferably 3s), and then the feeding speed is reduced (reduced to 30-60% of the previous feed flow rate a, preferably 50%). At this time, |△P| will decrease again until it is less than the pressure threshold. This cycle is repeated until △H is greater than 0 and greater than the height threshold, and the feeding is completed.

[0118] In actual production, in order to increase the feeding speed and save production time, a larger initial feeding speed is set. Due to the high viscosity of the slurry, when the coating suction chamber is fed with a constant initial feeding flow rate, the friction resistance between the slurry and the pores of the corrugated plate catalyst increases rapidly during the rising process of the slurry in the corrugated plate catalyst, causing the pressure in the coating suction chamber to rise rapidly. The actual measured pressure value P 实 Will be greater than the flow meter V all Calculated theoretical height H 理 The pressure value P corresponding to the value 理, the excessive pressure causes the slurry to quickly overflow from the edge gap between the carrier frame and the corrugated plate catalyst, while there is no slurry flowing in the corrugated plate catalyst. At this time, even if the coating height converted by the cumulative flow exceeds the height of the carrier body, there is no slurry in the carrier part, and the coating effect is not achieved. Therefore, controlling the relationship and balance between the feed flow rate and the pressure in the coating suction chamber is the key to achieving automatic coating of qualified corrugated plate catalysts.

[0119] Comparative Examples and Examples are provided below.

[0120] Example

[0121] The slurry coating device of the corrugated plate catalyst of the present invention is used, and the feed flow rate changes during the coating process, see Figure 7 .

[0122] Comparative Example

[0123] The slurry coating device of the corrugated plate catalyst of the present invention is used, and the coating process is fed at a constant feed flow rate, see Figure 6 .

[0124] See also Figure 6 , 7 The horizontal axis is the theoretical height H of the slurry in the catalyst carrier. 理 , the vertical axis is the pressure inside the coating suction chamber. Figure 6 , 7 The dotted line in the figure represents the theoretical coating height H 理 and the theoretical pressure P 理 The solid line represents the theoretical coating height H 理 The actual pressure P 实 relationship.

[0125] Figure 6 In the case where the operation in step S3 is not performed, that is, when △H is less than 0 and |△P| is greater than the set pressure threshold of 1 kPa, the feed is not stopped for a short period of time and then the feed rate is reduced, but the feed is fed at a constant rate, resulting in slurry overflow and the actual pressure P 实 Much greater than the theoretical pressure P 理 , causing the feeding to be incomplete.

[0126] and Figure 7 When it is detected that △H is less than 0 and △P is greater than 1KPa, the feed is stopped briefly (e.g., 1-5s, preferably 3s) and then the feed flow rate is reduced to 30-60% (preferably 50%) of the original feed flow rate. The actual pressure P of the coating suction chamber is 实 It will first drop, and then slowly rise again. 实 Once again exceeds the pressure value P converted by the total flow meter 理When the pressure reaches 1 KPa, the feeding is stopped again for a short time (e.g., 1-5 seconds, preferably 3 seconds), and then the feeding flow rate of the coating suction chamber is further reduced to 30-60% (preferably 50%) of the previous feeding flow rate. And so on, the flow rate is reduced in multiple stages until ΔH is greater than 0 and greater than the height threshold.

[0127] The above operation can make the slurry feeding process more stable and improve the uniformity of the slurry in all the pores of the corrugated plate catalyst;

[0128] S4. The second cavity 4 is evacuated to a set vacuum degree through the suction unit, and the coating suction valve 12 is opened (at the same time, the sight glass barrel discharge valve 25 is quickly opened and then closed, so that the slurry in the sight glass barrel 16 quickly flows into the second cavity 4). The slurry filled in the second cavity 4 and the corrugated plate catalyst is quickly pumped to the slurry storage tank 21, and part of the slurry adheres to the inner wall of the corrugated plate catalyst to achieve the coating purpose.

[0129] Preferably, during the suction process, it is also necessary to simultaneously control the gland 301 to cover or not cover the upper surface of the corrugated plate catalyst. When the upper surface of the corrugated plate catalyst is covered, the sucked slurry mainly comes from the pores around the corrugated plate catalyst; when the upper surface of the corrugated plate catalyst is not covered, the sucked slurry mainly comes from the central pores of the corrugated plate catalyst. Specifically:

[0130] When the second cavity 4 is evacuated to the set vacuum degree, the upper surface of the corrugated plate catalyst is first covered, so that the airflow can pass through the corrugated plate catalyst along the gap between the outer edge of the corrugated plate catalyst and the inner wall of the supporting frame 39, and the coating suction valve 12 is opened to start vacuum suction, and the excess slurry in the second cavity 4 and the corrugated plate catalyst holes is sucked out by vacuum to form a through hole; the pressure cover 301 is controlled to be away from the upper surface of the corrugated plate catalyst again, so that the airflow can pass through the corrugated plate catalyst along the center of the corrugated plate catalyst, and the coating suction valve 12 is opened to start vacuum suction, so that the central channel and the corner channels of the corrugated plate catalyst can be effectively sucked. This process can be repeated many times, so that the airflow can pass through the corrugated plate catalyst 1 along the center of the corrugated plate catalyst 1.

[0131] The specific implementation method of evacuating the second cavity 4 to a set vacuum degree by means of a suction unit is as follows: when the slurry delivery is stopped, the slurry delivery valve 17 is closed, the feeding into the first cavity 22 is stopped, the vacuum pump 9 is operated and the first vacuum control valve 10 is opened, and after the interior of the second cavity 4 reaches the set vacuum degree, the first vacuum control valve 10 is closed, and the interior of the second cavity 4 is maintained in a vacuum state; the coating suction valve 12 is opened, and the slurry filled inside the first cavity 22 and the corrugated plate catalyst is quickly pumped into the second cavity 4, and part of the slurry adheres to the inner wall of the corrugated plate catalyst to achieve the coating purpose, and at the same time, the sight glass barrel discharge valve 25 is quickly opened and then closed, so that the slurry in the sight glass barrel 16 quickly flows into the second cavity 4, and then the number of times the first vacuum control valve 10 is opened is controlled, and multiple vacuum suctions are performed to achieve the purpose of connecting all the pores in the catalyst carrier.

[0132] After suction, the first return valve 14 is opened to recover the slurry to the slurry storage tank 21 .

[0133] S5, the transfer unit 3 transfers the corrugated plate catalyst to the suction chamber and fixes it, controls the pressure cover 301 of the other transfer unit 3 to cover or stay away from the upper surface of the corrugated plate catalyst, starts suction, and further forms through holes inside the corrugated plate catalyst. This process can refer to step S4 to achieve the purpose of controlling the precise loading amount.

[0134] The transfer unit 3 then transfers the corrugated plate catalyst to the second weighing unit 6, and the second weighing unit 6 measures the mass M2 of the coated corrugated plate catalyst;

[0135] S6. Determine whether the difference between M2 and M1 is within the preset range. If so, place the corrugated plate catalyst at rest, dry and cool. If the difference between M2 and M1 is higher than the preset range, repeat steps S4-S5. If the difference between M2 and M1 is lower than the preset range, repeat steps S3-S5.

[0136] In the above step S4, a large flow rate and high vacuum are used to suck the slurry on the corrugated plate catalyst to ensure that all the pores of the corrugated plate catalyst are connected, wherein the maximum flow rate ranges from 10,000 to 25,000 cubic meters per hour, and the relative vacuum ranges from -30 KPa to -80 KPa; the suction time is 2 to 5 seconds, and the suction is repeated 1 to 2 times.

[0137] In the above step S5, the corrugated plate catalyst slurry is sucked in an alternating manner of large flow rate, high vacuum and small flow rate, low vacuum, so as to achieve an accurate loading amount. The small flow rate range is 80-800 cubic meters per hour, the relative vacuum range is -10KPa to -30KPa, the suction time is 30 seconds to 90 seconds (preferably 1 minute), and the suction is 1-2 times.

[0138] The advantage of setting step S4 and step S5 is that if only step S4 is set, that is, only the coating suction chamber is set, if the coating suction chamber is sucked for multiple times in a row, more slurry is sucked out, and the slurry after suction flows back to the slurry storage tank, and the water in this part of the slurry evaporates (the suction process is under a certain vacuum, the temperature is high, resulting in rapid evaporation of the slurry water), the slurry concentration and viscosity change causes the slurry properties to change, and then flows to the coating suction chamber through the slurry storage tank, directly affecting the coating result. When setting the coating suction chamber and the suction chamber, the parameters of both are set (such as suction vacuum, suction time, number of suctions), which has little effect on the slurry, more stable control of the coating result, and can also be produced continuously with high production efficiency.

[0139] The specific implementation method of standing and drying and cooling the corrugated plate catalyst is as follows:

[0140] The corrugated plate catalyst that meets the quality requirements after coating is placed in the static unit 32, and then transferred to the pre-drying unit, the final drying unit, and the cooling unit in sequence.

[0141] After step S6, the following steps are also included:

[0142] After cooling, the corrugated plate catalyst carrier is taken out from the carrying frame, and the corrugated plate catalyst carrier enters the roasting process. The corrugated plate catalyst is then cut into any shape and packaged, and can be transported after packaging.

[0143] The advantages of the slurry coating device of the corrugated plate catalyst in this example are:

[0144] The corrugated plate catalyst carrier is loaded by the carrier frame, which is not only convenient for the transportation of the corrugated plate catalyst product, but more importantly, in order to realize the needs of coating, suction, static, drying and cooling processes, the corrugated plate catalyst carrier is taken out from the carrier frame after cooling, enters the roasting process, and then the corrugated plate catalyst is cut into any shape and then packaged, and the carrier frame can be reused. Compared with the existing technology of first packaging the corrugated plate carrier, and then coating, drying and roasting, it is not only low in cost, but also improves the reuse rate of the carrier frame.

[0145] By allowing the slurry to enter the lower part of the corrugated plate catalyst and determining whether the quantitative coating has been completed through the first weighing unit and the second weighing unit, the coating height, quality and uniformity of the slurry in the corrugated plate catalyst can be accurately controlled. At the same time, it can also be applied to multiple segmented coatings of various coatings to meet the segmented coating needs of catalyst production; it also realizes the switching of coating delivery and recovery, and adopts the lower suction unit to facilitate coating recovery, without pollution and cross-border coating, and make the catalyst coating uniform, greatly improving the quality of catalyst coating, saving raw materials, and improving the performance of corrugated plate catalysts; it realizes weighing, coating, suction, weighing, standing, and drying operations; by setting a flow control valve, a pressure regulating valve, and a pressure sensor, the stability of the coating can be improved; by setting a pressure cover, the uniformity of suction can be improved; the weighing data, coating flow, coating pressure, coating height, and standing drying time parameters can all be set by the user, and the user can easily read and modify them through the touch screen, which improves the digital level of the production line; by adjusting the time of each step, continuous production of the catalyst can be achieved.

[0146] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A slurry coating device for a corrugated plate catalyst, characterized in that: include: A carrying frame, the carrying frame is used to load the corrugated plate catalyst, the upper side and the lower side of the carrying frame are both provided with openings, a supporting portion for supporting the corrugated plate catalyst is provided in the carrying frame, and the supporting portion is provided with an opening; A first weighing unit, wherein the first weighing unit is used to weigh the initial corrugated plate catalyst; A coating suction chamber, wherein the coating suction chamber is used to accommodate an initial corrugated plate catalyst, and a pressure sensor is disposed in the coating suction chamber; A feeding unit, the feeding unit is connected to the coating suction chamber, and is used to transport slurry into the coating suction chamber, so that the initial corrugated plate catalyst coating slurry located on the coating suction chamber; a flow meter is provided on the pipeline connecting the feeding unit and the coating suction chamber; A suction unit, the suction unit is connected to the coating suction chamber, and the suction unit is used to evacuate the coating suction chamber and to suck the slurry in the coating suction chamber and the corrugated plate catalyst; a second weighing unit, the second weighing unit being used to weigh the corrugated plate catalyst separated from the coating suction chamber; A stationary unit, the stationary unit is used to place the corrugated plate catalyst weighed by the second weighing unit; The transfer unit is used to grab the corrugated plate catalyst and transfer the corrugated plate catalyst to the coating suction chamber, and transfer the corrugated plate catalyst on the coating suction chamber to the static unit.

2. The slurry coating device for the corrugated plate catalyst according to claim 1, characterized in that: The transfer unit includes a clamping member, a pressure cover and a driving member. The clamping member is used to grab the supporting frame. The driving member is connected to the pressure cover and is used to drive the pressure cover to move in the vertical direction. When the clamping member clamps the supporting frame, the pressure cover is located above the upper opening of the supporting frame and directly above the corrugated plate catalyst.

3. The slurry coating device for the corrugated plate catalyst according to claim 2, characterized in that: The device further comprises a suction chamber, the coating suction chamber is arranged adjacent to the suction chamber, and the suction unit is communicated with the suction chamber.

4. The slurry coating device for the corrugated plate catalyst according to claim 1, characterized in that: The coating suction chamber comprises a first cavity and a second cavity, the first cavity is located above the second cavity, and the first cavity and the second cavity are connected through a coating suction valve.

5. The slurry coating device for the corrugated plate catalyst according to claim 3, characterized in that: The suction unit includes a first vacuum pipeline, a vacuum pump, a second vacuum pipeline, a first slurry recovery pipeline, and a second slurry recovery pipeline. The first vacuum pipeline is connected to the coating suction chamber, the vacuum pump is arranged in the first vacuum pipeline, one end of the second vacuum pipeline is connected to the first vacuum pipeline, and the other end of the second vacuum pipeline is connected to the suction chamber; one end of the first slurry recovery pipeline is connected to the coating suction chamber, the other end of the first slurry recovery pipeline is connected to the second slurry recovery pipeline, one end of the second slurry recovery pipeline is connected to the suction chamber, and the other end of the second slurry recovery pipeline is connected to the feeding unit.

6. The slurry coating device for the corrugated plate catalyst according to claim 1, characterized in that: The feeding unit comprises a slurry storage tank, a slurry delivery pipeline, and a slurry delivery pump. The slurry storage tank is connected to the coating suction chamber through the slurry delivery pipeline. The slurry delivery pipeline is provided with the slurry delivery pump and flow meter.

7. The slurry coating device for the corrugated plate catalyst according to claim 6, characterized in that: The device also includes a regulating pipeline and a pressure regulating valve. One end of the regulating pipeline is connected to the slurry storage tank, and the other end of the regulating pipeline is connected to the slurry conveying pipeline. The regulating pipeline is provided with the pressure regulating valve.

8. The slurry coating device for a corrugated plate catalyst according to claim 1, characterized in that: The device also includes a drying unit and a cooling unit. The drying unit is used to dry the corrugated plate catalyst after being left to stand by the standing unit; and the cooling unit is used to cool the dried corrugated plate catalyst.

9. A coating method of a slurry coating device for a corrugated plate type catalyst according to any one of claims 1 to 8, characterized in that: include: S1, the corrugated plate catalyst is contained in the carrying frame, and the transfer unit transfers the carrying frame and the corrugated plate catalyst to the first weighing unit, and the first weighing unit measures the mass M1 of the carrying frame and the corrugated plate catalyst not coated with slurry; S2, the transfer unit transfers the corrugated plate catalyst to the coating suction chamber and fixes and seals it; S3, the feeding unit delivers slurry to the coating suction chamber, and the feeding speed is adjusted by the flow meter and the pressure sensor. When the slurry coating height in the corrugated plate catalyst is within the height setting range and the pressure in the coating suction chamber is within the pressure setting range, the slurry delivery is stopped; S4, operating the suction unit to make the coating suction chamber reach a set vacuum degree, and then sucking away the excess slurry in the coating suction chamber and the corrugated plate catalyst holes; S5, the transfer unit transfers the corrugated plate catalyst to the second weighing unit, and the second weighing unit measures the mass M2 of the coated corrugated plate catalyst; S6. Determine whether the difference between M2 and M1 is within the preset range. If so, place the corrugated plate catalyst at rest, dry and cool. If the difference between M2 and M1 is higher than the preset range, repeat steps S4-S5. If the difference between M2 and M1 is lower than the preset range, repeat steps S3-S5.

10. The coating method of the slurry coating device of the corrugated plate type catalyst according to claim 9, characterized in that: In step S3, when the slurry coating height H in the corrugated plate catalyst is 理 With coating setting height H 设 The difference △H is greater than the height threshold, and when the theoretical pressure P in the coating suction chamber 理 The measured actual pressure P 实 When the absolute value of the difference |△P| is less than the pressure threshold, the slurry delivery is stopped, where: The theoretical coating height H of the slurry in the corrugated plate catalyst is obtained by the following formula: H 理 =(V all -V1) / (a*b*θ), Among them, V all is the cumulative flow of the flow meter after the start of feeding, a is the length of the carrier frame, b is the width of the carrier frame, V1 is the volume of the first cavity of the coating cavity, and θ is the porosity of the pores of the corrugated plate catalyst; The theoretical pressure P in the coating cavity is obtained by the following formula: P 理 =10*(H 理 +h)*d, Among them, H 理 is the theoretical coating height of the corrugated plate catalyst, h is the distance between the pressure sensor in the coating suction chamber and the lowermost end of the corrugated plate catalyst, and d is the slurry density.

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