Deformed dressing particle removing table-board structure and removing method thereof

Abstract

The invention belongs to the technical field of abnormal dressing particle removal, and aims to solve the problem of low abnormal dressing particle removal rate in the prior art. The invention discloses a deformity dressing particle removing table top structure and a removing method thereof.The removing table top structure comprises a discharging buffering primary selection area, a main selection area and a deformity dressing particle removing guaranteeing area, the discharging buffering primary selection area is arranged at the upper right corner of a table top, and the main selection area is arranged in the middle of the table top; the deformed dressing particle removal guarantee area is arranged at the lower left corner of the table top, and U-shaped boss structures are arranged on the three areas; according to the method, U-shaped boss structures arranged on a discharging buffering primary selection area, a main selection area and a deformed dressing particle removal guarantee area are used for removing deformed dressing particles. The technical effects that the impulse of the vibration selection particles is reduced, and the dressing particles to be subjected to vibration selection are preliminarily optimized are achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of deformed clothing particle removal, and in particular, relates to a deformed clothing particle removal table structure and a removal method thereof. Background Art

[0002] In order to ensure that the TRISO coated fuel particles do not damage the coating due to the mutual stress during the pressing process of the spherical fuel element of the high temperature gas-cooled reactor, thereby destroying its safety characteristics, a layer of matrix graphite powder is coated on the outside of the coated fuel particles as a buffer layer (hereinafter referred to as: dressing layer) to eliminate the stress between the particles during the pressing process of the spherical fuel element, protect the coating, and ensure that the inherent safety characteristics of the coated fuel particles are not compromised during the pressing process of the spherical fuel element.

[0003] The designed thickness of the dressing coating is about 0.25mm. The preparation process uses ethanol as a binder to continuously bond the matrix graphite powder to grow. The prepared dressing particles are mixed with coating thickness, poor sphericity and deformed dressing particles (twins, multiple births, etc.). The dressing particles that do not meet the requirements are successively screened and vibrated to be eliminated. Two problems were found during the use of the existing device:

[0004] (1) The ability to reject deformed dressing particles is limited. During production and use, it was found that the ability to reject deformed dressing particles was weak, resulting in a large number of "twin" particles mixed in the selected qualified dressing particles.

[0005] (2) Low vibration efficiency. Limited by the existing device’s ability to remove deformed clothing particles, the feed rate must be strictly controlled at about 0.5 kg / h during vibration selection of clothing particles to prevent particles from colliding with each other on the table, interfering with the running trajectory of deformed clothing particles on the vibration selection table, and affecting the rejection rate of deformed clothing particles.

[0006] After cleaning tests, it was found that the bodies of deformed dressed particles such as "twins" were mostly unqualified dressed particles with a particle diameter of 2 and a coating thickness lower than the design requirement (0.25mm). Since the coating thickness did not meet the design requirements, the stress elimination capacity of the pressing process was lower than the design expectation, so it was unable to offset the stress of the pressing process, resulting in a great risk of cracking of the TRISO coated fuel particle coating during the pressing process. The low efficiency affected the output efficiency of qualified dressed particles, and there was a risk of affecting the production of the back-end process of dressing. Summary of the invention

[0007] The purpose of the present application is to provide a deformed clothing particle rejection table structure and a rejection method thereof, so as to solve the problem of low rejection rate of deformed clothing particles in the prior art.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] In a first aspect, the present application provides a deformed clothing particle removal table structure, comprising:

[0010] A material unloading buffer preliminary selection area is arranged at the upper right corner of the table top, and a first U-shaped boss structure is arranged on the material unloading buffer preliminary selection area;

[0011] A main selection area is arranged in the middle of the table top, and a first U-shaped boss structure is arranged on the main selection area;

[0012] The deformed clothing particle rejection protection area is arranged at the lower left corner of the table top, and a first U-shaped boss structure is arranged on the deformed clothing particle rejection protection area.

[0013] In some embodiments, the first U-shaped boss structures are arranged in an array.

[0014] In some embodiments, in the blanking buffer primary selection area, five of the first U-shaped boss structures are arranged in the first row, four of the first U-shaped boss structures are arranged in the second row, five of the first U-shaped boss structures are arranged in the third row, four of the first U-shaped boss structures are arranged in the fourth row, five of the first U-shaped boss structures are arranged in the fifth row, and four of the first U-shaped boss structures are arranged in the sixth row.

[0015] In some embodiments, the protrusion direction of the first U-shaped boss structure is toward the upper right corner.

[0016] In some embodiments, the number of the second U-shaped boss structures is 2.

[0017] In some embodiments, two of the second U-shaped boss structures are arranged toward the upper right corner.

[0018] In some embodiments, the size of the two second U-shaped boss structures is larger than the size of the first U-shaped boss structure.

[0019] In some embodiments, the number of the third U-shaped boss structure is 1.

[0020] In some embodiments, the third U-shaped boss structure is arranged toward the upper right corner.

[0021] In some embodiments, a size of the third U-shaped boss structure is larger than a size of the first U-shaped boss structure.

[0022] In a second aspect, the present application provides a method for removing deformed clothing particles, comprising:

[0023] Step 1: Dressing pellet feeding;

[0024] Step 2: Buffer and disperse the materials that first arrive at the table through the material buffer primary selection area;

[0025] Step 3: Divide the deformed and dressed particles through the main selection area;

[0026] Step 4: The deformed clothing particles escaping from the material buffer primary selection area and the main selection area are removed through the deformed clothing particle removal guarantee area;

[0027] Step 5: After vibration selection, collect the dressing particles.

[0028] Compared with the prior art, the deformed clothing particle removal table structure and the removal method provided by the present application have the following beneficial effects:

[0029] By observing that the movement state of deformed clothing particles has the property of "climbing", the present application achieves the technical effect of reducing the impulse of the vibration-selected particles and performing preliminary optimization of the clothing particles to be vibration-selected by designing the primary selection zone. The present application achieves the technical effect of separating and rejecting deformed clothing particles and qualified clothing particles by designing the main selection zone. The present application achieves the technical effect of rejecting deformed clothing particles by designing a guarantee zone for rejecting deformed clothing particles.

[0030] Through the design of the above three zones on the table and the selection of surface coating materials, this application achieves the optimal dispersion of particles on the vibration table, reduces the probability of particles on the vibration table colliding and interfering with each other, expands the utilization rate of the vibration table, increases the feed volume by about 1.0 times, and achieves the technical effect of improving the working efficiency of the vibration table. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for the technical description.

[0032] Figure 1 A schematic diagram of the structure of the tabletop for removing deformed clothing particles provided in this application;

[0033] Figure 2 A schematic diagram of the design of the table structure for removing deformed clothing particles provided in this application;

[0034] Figure 3 A comparison diagram of the particle running status of the surface before and after the use of the material buffer primary selection area provided in this application;

[0035] Figure 4 A comparison of the running status of the surface particles before and after the main selection area provided for this application;

[0036] Figure 5 A comparison of the running status of the surface particles before and after the use of the deformed clothing particle removal guarantee area provided in this application;

[0037] Figure 6 A flow chart of the method for removing deformed clothing particles provided in this application;

[0038] Figure 7 This is a process diagram for removing deformed clothing particles provided in this application.

[0039] Description of reference numerals:

[0040] 1. Material buffer preliminary selection area; 2. Main selection area; 3. Deformed clothing particle removal guarantee area; 4. Deformed clothing particles; 5. Clothing particles. DETAILED DESCRIPTION

[0041] The following is further explained in detail through specific implementation methods.

[0042] like Figures 1 to 5 As shown, the present application provides a table structure for removing deformed clothing particles, and the table is provided with a material buffer preliminary selection area 1, a main selection area 2, and a deformed clothing particle removal guarantee area 3. The material buffer preliminary selection area 1 is arranged at the upper right corner of the table, the main selection area 2 is arranged in the middle of the table, and the deformed clothing particle removal guarantee area 3 is arranged at the lower left corner of the table.

[0043] like Figures 1 to 3 As shown, the material unloading buffer primary selection area 1 is arranged at the upper right corner of the table surface, and the material unloading buffer primary selection area 1 is composed of a group of first U-shaped boss structures.

[0044] Preferably, the group of first U-shaped boss structures are arranged in an array, with 5 first U-shaped boss structures arranged in the first row, 4 first U-shaped boss structures arranged in the second row, 5 first U-shaped boss structures arranged in the third row, 4 first U-shaped boss structures arranged in the fourth row, 5 first U-shaped boss structures arranged in the fifth row, and 4 first U-shaped boss structures arranged in the sixth row.

[0045] Optionally, the protrusion directions of the group of first U-shaped boss structures are all toward the upper right corner.

[0046] The main functions of the material unloading buffer primary selection area 1 include: offsetting the impulse of the clothing particles, ensuring the dispersed vibration selection of the clothing particles, and reducing the mutual interference of the clothing particles in the vibration selection process.

[0047] Offsetting the impulse of the clothing particles is mainly manifested in: using a regular, dispersed U-shaped boss structure (the first U-shaped boss structure) to offset the impulse of the clothing particles that first arrive at the vibration selection table, so as to eliminate the influence of the impulse generated in the clothing particle feeding process on the running trajectory of the clothing particles in the vibration selection process, and ensure that the clothing particles are in a controlled vibration optimization state on the vibration optimization device table.

[0048] Ensure that the clothing particles are dispersed and vibrated, and reduce mutual interference in the clothing particle vibration process, mainly manifested in: using regular and dispersed small U-shaped boss structures, arranging them according to process requirements, forming multiple channels for clothing particle vibration feeding, ensuring dispersed movement during the clothing particle vibration process, forming multi-channel vibration of the clothing particle table, reducing the probability of collision between the clothing particles during the vibration process, thereby reducing mutual interference in the clothing particle vibration process.

[0049] like Figure 1 , Figure 2 and Figure 4 As shown, the main selection area 2 is arranged in the middle of the table top, and the main selection area 2 is composed of a group of second U-shaped boss structures.

[0050] Preferably, the group of second U-shaped boss structures includes two second U-shaped boss structures, the two second U-shaped boss structures are arranged toward the upper right corner, and the two second U-shaped boss structures are arranged at an oblique angle.

[0051] Optionally, the group of second U-shaped boss structures are arranged in an array.

[0052] Optionally, the size of the second U-shaped boss structure is larger than that of the first U-shaped boss structure.

[0053] The main function of the main selection area 2 is to deeply remove the deformed clothing particles 4 and improve the rejection rate of the deformed clothing particles. This is mainly manifested in that the qualified clothing particles 5 and the deformed clothing particles 4 flow through the main selection area 2 and are separated by the combined effects of friction, gravity, vibration driving force, and trajectory guidance of the long U-shaped boss structure (the second U-shaped boss structure), which can divert most of the deformed clothing particles 4 to the direction of the unqualified area. Since the main selection area 2 is in the middle of the table, the deformed clothing particles 4 are close to the unqualified clothing particle collection bin after diversion, and the risk of entering the qualified bin is low, thereby significantly improving the rejection rate of the deformed clothing particles.

[0054] like Figure 1 , Figure 2 and Figure 5 As shown, the deformed clothing particle rejection protection area 3 is arranged in the middle position of the table top, and the deformed clothing particle rejection protection area 3 is composed of a group of third U-shaped boss structures.

[0055] Preferably, the group of third U-shaped boss structures is a single second U-shaped boss structure, and the second U-shaped boss structure is arranged toward the upper right corner.

[0056] Optionally, the third U-shaped boss structure has a size larger than that of the first U-shaped boss structure.

[0057] The main function of the deformed clothing particle removal guarantee area 3 is to consolidate the deformed clothing particle removal effect and remove the deformed clothing particles 4 that escape the selection of the main selection area 2. It is mainly manifested in the deep removal of a small amount of deformed clothing particles 4 that have not been removed after flowing through the material buffer primary selection area 1 and the main selection area 2. It is also the last barrier to remove the deformed clothing particles 4 during the vibration selection process.

[0058] According to the design principle of the deformed clothing particle rejection guarantee area 3 and the actual deformed clothing particle rejection test, even if the deformed clothing particles 4 are not effectively rejected after the feeding buffer primary selection area 1 and the main selection area 2, the running trajectory of the deformed clothing particles 4 is getting closer and closer to the unqualified vibration selection area. After the guidance of the deformed clothing particle rejection guarantee area 3, the running trajectory of this part of the deformed clothing particles 4 can be effectively optimized, and the deformed clothing particles 4 can be diverted to the unqualified vibration selection area to prevent the deformed clothing particles 4 from entering the qualified clothing particle area.

[0059] In addition, if Figure 6 and Figure 7 As shown, the present application also provides a method for removing deformed clothing particles, comprising the following steps:

[0060] Step 1: Feeding of clothing particles and setting of parameters. Use the original device to feed clothing particles and set the corresponding parameters.

[0061] Step 2: Buffer and disperse the materials that first arrive at the table through the material buffer primary selection area 1 to ensure that the particles are evenly dispersed and at the same time have the function of removing deformed particles.

[0062] Step 3: Through the main selection area 2, the deformed clothing particles are removed, and the deformed clothing particles 4 and 5 are diverted, which plays the main role of removing the deformed clothing particles.

[0063] Step 4: Through the deformed clothing particle removal guarantee area 3, the deformed clothing particles 4 that "escape" from the material buffer preliminary selection area 1 and the main selection area 2 are preferentially removed to ensure that the deformed clothing particles 4 can be removed in maximum quantity.

[0064] Step 5: After vibration selection, the dressing particles 5 are collected.

[0065] Through the improvement of the table in this application, the deformed dressing particles can be removed efficiently and effectively. The particles on the vibration table are dispersed and optimized, the probability of mutual collision and interference of the dressing particles on the vibration table is reduced, the utilization rate of the vibration table is expanded, the feed volume is increased by about 1.0 times, and the working efficiency of the table is improved.

[0066] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A table structure for removing deformed clothing particles, characterized in that: include: A material unloading buffer preliminary selection area (1) is arranged at the upper right corner of the table top, and a first U-shaped boss structure is arranged on the material unloading buffer preliminary selection area (1); A main selection area (2) is arranged in the middle of the table top, and a first U-shaped boss structure is arranged on the main selection area (2); The deformed clothing particle rejection protection area (3) is arranged at the lower left corner of the table top, and a first U-shaped boss structure is arranged on the deformed clothing particle rejection protection area (3).

2. The deformed clothing particle removal table structure according to claim 1, characterized in that: The first U-shaped boss structures are arranged in an array.

3. The deformed clothing particle removal table structure according to claim 2 is characterized in that: In the blanking buffer primary selection area (1), the first row is arranged with 5 of the first U-shaped boss structures, the second row is arranged with 4 of the first U-shaped boss structures, the third row is arranged with 5 of the first U-shaped boss structures, the fourth row is arranged with 4 of the first U-shaped boss structures, the fifth row is arranged with 5 of the first U-shaped boss structures, and the sixth row is arranged with 4 of the first U-shaped boss structures.

4. The deformed clothing particle removal table structure according to claim 2 or 3, characterized in that: The protrusion direction of the first U-shaped boss structure is toward the upper right corner.

5. The deformed clothing particle removal table structure according to claim 1, characterized in that: The number of the second U-shaped boss structures is 2.

6. The deformed clothing particle removal table structure according to claim 5, characterized in that: The two second U-shaped boss structures are arranged toward the upper right corner.

7. The deformed clothing particle removal table structure according to claim 5, characterized in that: The size of the two second U-shaped boss structures is greater than the size of the first U-shaped boss structure.

8. The deformed clothing particle removal table structure according to claim 1, characterized in that: The number of the third U-shaped boss structure is 1, and the third U-shaped boss structure is arranged toward the upper right corner.

9. The deformed clothing particle removal table structure according to claim 1, characterized in that: The size of the third U-shaped boss structure is greater than that of the first U-shaped boss structure.

10. A method for removing deformed clothing particles, characterized in that: Using the deformed dressing particles as described in any one of claims 1 to 9 to remove the table structure comprises: Step 1: Dressing pellet feeding; Step 2: Buffer and disperse the materials that first arrive at the table through the material buffer primary selection area; Step 3: Divide the deformed and dressed particles through the main selection area; Step 4: The deformed clothing particles escaping from the primary selection area and the main selection area are removed through the deformed clothing particle removal guarantee area; Step 5: After vibration selection, collect the dressing particles.

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