Patent ID: 12226803

Among them:1—powder separation unit;10—separation device inlet;11—driving motor;12—counter-rotating roller;13—roller;14—powder accumulation bin;15—catalyst powder outlet;16—separation device outlet;17—shell;111—flat-plate catalyst;2—powder recovery unit;20—powder recovery inlet;21—cyclone outlet;22—primary filter;23—movable sealing sheet;24—secondary filter;25—cyclone passage;30—primary recovery chamber;31—secondary recovery chamber;41—induced draft fan interface;42—collection bin,43—recovery shell.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To make the objectives, technical schemes and advantages of embodiments of the present application more explicit, a clear and complete description of the technical schemes in the embodiments of the present application is given below in conjunction with the accompanying drawings in the embodiments of the present application. It is obvious that the embodiments described are part, rather than all, of the embodiments of the present application and not all of them. The components of the embodiments of the present application, which are generally described and illustrated in the accompanying drawings herein, are capable of being arranged and designed in a variety of different configuration.

The following detailed description of the embodiments of the present application provided in the accompanying drawings is therefore not intended to limit the scope of the present application for which protection is claimed, but merely to indicate selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained without creative effect by a person of ordinary skill in the art shall fall within the scope of protection of the present application.

It should be noted that similar labels and letters indicate similar items in the accompanying drawings below, hence, once an item is defined in one accompanying drawing, it needs no further definition or explanation in the subsequent accompanying drawings.

In the description of embodiments of the present application, it should be noted that where the terms “up”, “down”, “horizontal”, “in” etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or an orientation or positional relationship in which the product of the present application is customarily placed when in use, it is only for the purpose of facilitating and simplifying the description of the present application, and does not indicate or imply that the device or element referred to must have a particular orientation, or be constructed and operated in a particular orientation, and is therefore not to be understood as a limitation of the present application. Moreover, the terms “first”, “second”, etc. are used only to distinguish the description and are not to be understood as indicating or implying relative importance. Furthermore, where the term “horizontal” appears, it does not indicate that the part is required to be absolutely horizontal, but may be slightly inclined. For instance, “horizontal” simply means that the orientation is more horizontal in relation to “vertical” and does not mean that the structure must be perfectly horizontal, but can be slightly inclined.

In the description of the embodiments of the present application, it should also be noted that the terms “set”, “installed”, “connected” and “connection” are to be understood in a broad sense, unless otherwise expressly specified and limited. For example, it can be a fixed connection, a detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection via an intermediate medium, and it can be an internal connection between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the context of the present application is to be understood on a context-specific basis.

The present application is described in further detail below in conjunction with the accompanying drawings:

Referring toFIG.1andFIG.2which are schematic structural diagrams of a powder separation unit, a powder separation unit1includes a driving motor11, counter-rotating rollers12, rollers13, a powder accumulation bin14, a catalyst powder outlet15and a shell17; the counter-rotating rollers12and rollers13are configured inside the shell17, and the counter-rotating rollers12are configured in three groups, with end faces of the three groups of counter-rotating rollers12located on a same plane; the rollers13are configured in six groups, playing a grinding and transferring role; three groups of the rollers13are respectively configured in two intervals of the three groups of counter-rotating rollers12, and end faces of the rollers are arranged sinusoidally; the driving motor11drives the counter-rotating rollers12located in the same plane to perform counter-rotating rolling work; one end of the powder accumulation bin14is connected with the shell17, and the other end of the powder accumulation bin14is connected with the catalyst powder outlet15. Referring toFIG.3which is a schematic structural diagram of a powder recovery unit, a powder recovery unit2includes an induced draft fan, a powder recovery inlet20, a cyclone outlet21, a primary filter22, a movable sealing sheet23, a secondary filter24, a cyclone passage25and a recovery shell43; the induced draft fan is connected to an induced draft fan interface41, the powder recovery inlet20is configured on an outer wall of the recovery shell43, the cyclone outlet21is configured on an inner side wall of the recovery shell43, the cyclone passage25is configured between the powder recovery inlet20and the cyclone outlet21, the primary filter22and the secondary filter24is sequentially configured on the inner side wall of the recovery shell43from bottom to top, where the secondary filter24is configured on a cross section of the recovery shell43, an opening is configured in a middle position of the primary filter22, and the primary filter22forms a conical surface with the diameter larger at a top and the diameter smaller at a bottom.

In use, the catalyst powder outlet15and the powder recovery inlet20are connected, and a method for determining a wear ratio of a flat-plate catalyst according to the device for separating and recovering flat-plate catalyst powder specifically includes the following steps:before operation, the catalyst powder outlet15and the powder recovery inlet20are connected, and the induced draft fan at the induced draft fan interface41is initiated to enable the whole device for separating and recovering powder to be in a negative pressure state, where the movable sealing sheet23is in a closed state, that is, at the dotted line position, and the whole system has good sealing performance;the driving motor11is initiated and a flat-plate catalyst111is sent into the powder separation unit1from a separation device inlet10; after the catalyst plate is ground and transferred by the three groups of counter-rotating rollers12and the six groups of rollers13, the powder is separated from the catalyst plate, the catalyst plate leaves the powder separation unit1through a separation device outlet16, and the powder then leaves the powder separation unit1through the catalyst powder outlet15after passing through the powder accumulation bin14under the negative internal pressure of the device;subsequently, a mixture of the catalyst powder and air enters the powder recovery unit2through the powder recovery inlet20, and enters a primary recovery chamber30from the cyclone outlet21through the cyclone passage, where the large-particle powder avoids falling due to cyclone hitting against the chamber of the recovery device, while the air flow velocity rapidly decreases, and the combined effect of the two aspects creates a first deposit that lands on a collection bin42;then, the mixture passes through the primary filter22, where the movable sealing sheet23is in a closed state as a result of the negative pressure in a secondary recovery chamber31, and the mixture can only pass through the primary filter23, forming a secondary deposit that lands on the collection bin42;the mixture after passing through the primary filter is in the secondary recovery chamber31and continues to pass through the secondary filter24, forming a third deposit that lands on the movable sealing sheet23; and the air after passing through the multi-stage filter leaves the powder recovery unit2through the induced draft fan interface41;when the induced draft fan is turned off, the negative pressure in the secondary recovery chamber31disappears, the movable sealing sheet23is then opened, and the powder descends from the movable sealing sheet and is deposited on the collection bin42of the powder recovery unit2, thus, the separated powder all lands on the collection bin42;the collection bin42is opened to take out the powder, which is dried in an oven at 58-62 degrees Celsius (° C.) for 30 minutes (min), cooled to a room temperature and then weighed, recorded as M1;then a new catalyst sample plate with the same specification is taken to subject to the above powder separation and recovery process, then collected powder is taken out and dried in the oven at 58-62° C. for 30 min, cooled to the room temperature, and then weighed, recorded as M2; anda wear ratio F of the tested sample is obtained by calculation according to the following formula:

F=M⁢2-M⁢1M⁢2×100⁢%.

To improve the accuracy of the M2, several new catalyst plates may be taken for testing, where a test block of the plates needs to be retained and the average of the multiple tests is taken and substituted into the formula to be calculated as an important basic data to be retained in a catalyst wear profile database.

The device provided in the present application allows for rapid separation and recovery of metal meshes and powder from catalyst plates, therefore improving the utilization of catalyst resources; the wear ratios of flat-plate catalysts has been regulated with standardized requirements and standardized profiles established, allowing for obtaining accurate wear ratios of catalyst plates, while ensuring the sample strength and uniformity of distribution of test flow rates, which is of great importance to the management, application and production of catalysts. The present application is used to test new catalysts as well as in-service catalysts, where the plate and powder are thoroughly separated after passing through 9 groups of rollers and the powder is completely recovered after multi-stage precipitation, and the accurate wear ratio is obtained by the weight comparison method, which solves the problem that image recognition fails to identify the wear in the depth direction, effectively reducing the measurement error and improving the work efficiency.

The above represents only preferred embodiments of the present application and is not intended to limit the present application, and the present application may be subject to various modifications and variations for those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.