Device with flow guide wire bearing ring piece and flow guide wire

Abstract

The utility model discloses a device with a flow guide wire bearing ring sheet and flow guide wires, which comprises a secondary air flow guide ring, the secondary air flow guide ring comprises a flow guide wire bearing ring sheet for bearing a plurality of flow guide wires and a plurality of flow guide wires, the flow guide wire bearing ring sheet is a sheet-shaped ring and has an inner diameter and an outer diameter, and the flow guide wires are arranged in the flow guide wire bearing ring sheet. And the flow guide wires are used for forming a secondary air flow channel. The utility model provides a simple, convenient, economical and feasible solution for simultaneously realizing high-recovery-rate collection and small-particle removal of powder products.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-solid separation in powder, and in particular to a device with a guide wire bearing ring sheet and a guide wire. Background Art

[0002] When mechanical crushing equipment is used to prepare powders, a large number of small particles less than 5-10µm will be produced. The presence of these small particles increases the width of the particle size distribution, which in many cases seriously affects the performance of the powder. For example, when preparing powder coatings, the presence of a large number of such particles will greatly reduce the fluidity of the powder, making it difficult to spray.

[0003] Therefore, in order to improve the quality of powder, small particles smaller than 5-10µm should be removed from the product as much as possible to reduce the particle size distribution.

[0004] In the prior art, for products with a smaller average particle size, various classifiers are used to remove fine particles during the collection process; for products with a larger average particle size, traditional screening methods can be used to remove fine particles. Multiple classification operations can further reduce the content of fine particles. However, these methods are costly, energy-intensive, and complex to operate (such as traditional impeller classifiers), or even impossible to perform (such as using screening methods to screen out fine particles below 10µm).

[0005] The cyclone separator has the function of collecting solid particles. It is a device that does not require any moving parts and uses centrifugal force to rotate the airflow to collect the entrained particles. This device has a simple structure, low cost, and high efficiency, and is widely used in gas-solid separation operations. However, in addition to being able to remove a very small amount of small particles, the existing cyclone separator has almost no particle classification function. Although there are solutions in the prior art to improve the cyclone separator to classify particles, it has the following technical problems: complex design, high cost, and complex operation and control. Utility Model Content

[0006] In order to solve the above technical problems, the utility model discloses a device having a guide wire bearing ring and a guide wire, the device comprising:

[0007] A device having a guide wire bearing ring sheet and a guide wire, comprising:

[0008] A secondary air guide ring, comprising: a guide wire bearing ring sheet for bearing a plurality of guide wires, and a plurality of guide wires, wherein:

[0009] The guide wire bearing ring is a sheet-shaped circular ring having inner and outer diameters.

[0010] The guide wire is used to form a secondary air flow channel.

[0011] Preferably,

[0012] A gap is formed between every two adjacent guide wires.

[0013] Preferably,

[0014] The guide wire bearing ring piece is a single guide wire bearing ring piece or two guide wire bearing ring pieces facing each other.

[0015] Preferably,

[0016] When the guide wire bearing ring is a single guide wire bearing ring, multiple guide wires are evenly attached to the guide wire bearing ring along the axial direction.

[0017] Preferably,

[0018] When the guide wire bearing ring pieces are two guide wire bearing ring pieces, a plurality of guide wires are evenly attached between two opposite guide wire bearing ring pieces along their axial direction.

[0019] Preferably,

[0020] The secondary air guide ring is arranged above the discharge port of the cyclone separator via a flange.

[0021] Preferably,

[0022] The inner and outer diameters of the guide wire bearing ring sheet are the same as the inner and outer diameters of the flange.

[0023] Preferably,

[0024] The inner end and the outer end of each guide wire are respectively located at the inner diameter edge and the outer diameter edge of the guide wire bearing ring sheet.

[0025] Preferably,

[0026] The cross section of the guide wire is circular, square or other shapes.

[0027] Preferably,

[0028] The bending direction of the guide wire is convex, straight or concave.

[0029] Preferably,

[0030] The secondary air guide ring is arranged just above the discharge port of the cyclone separator and is tightened with flange bolts during installation.

[0031] Preferably,

[0032] The guide wire bearing ring sheet and the guide wire are made of hard material.

[0033] Preferably,

[0034] The hard material includes metal and plastic.

[0035] Preferably,

[0036] The number of the guide wires is greater than or equal to 4.

[0037] Preferably,

[0038] The height of the guide wire is 0.25-3 mm.

[0039] Preferably,

[0040] The angle between the radius line passing through the outer end of the guide wire and the radius line passing through the inner end of the guide wire is 0-80°.

[0041] In addition, the utility model also discloses a device having a guide wire bearing ring and a guide wire, comprising:

[0042] A secondary air guide ring includes a plurality of secondary air inlets, each of which has a gap, wherein:

[0043] Before the particles enter the discharge port of the cyclone separator, the secondary air guide ring uses the secondary air inlet to introduce upward airflow, and the air enters through the gap to form an air knife. The air knife enters the cyclone separator tangentially along the secondary air flow channel in the secondary air guide ring.

[0044] The morphological parameters of the gap, and the air velocity and flow rate of the wind knife meet the following constraints: the wind knife does not destroy the rotating flow field inside the cyclone separator, and the wind knife can effectively prevent large particles inside the cyclone separator from being removed, while breaking up particle agglomerates and further sorting the particles.

[0045] Preferably,

[0046] The constraint condition also includes: the rotational kinetic energy of the wind knife does not suffer different losses due to changes in the size of the gap.

[0047] In addition, the utility model also discloses a method for removing small particles in powder collected by a cyclone separator, comprising the following steps:

[0048] Before the particles enter the discharge port of the cyclone separator, the secondary air inlet is used to introduce an upward airflow, and air is introduced through the gap to form an air knife, which enters the cyclone separator tangentially along the secondary air flow channel.

[0049] Among them, the morphological parameters of the gap, and the air velocity and flow rate of the wind knife meet the following constraints: the wind knife does not destroy the rotating flow field inside the cyclone separator, and the wind knife can effectively prevent large particles inside the cyclone separator from being removed, while breaking up particle agglomerates and further sorting the particles.

[0050] Compared with the prior art, the beneficial effects of the utility model are:

[0051] The utility model provides a device with a guide wire bearing ring and a guide wire, which has a simple scheme and is easy to operate, and provides a simple, convenient, economical and feasible method for realizing gas-solid separation and particle classification at the same time. The utility model introduces high-speed, low-flow secondary air intake through the gap air intake, and forms a wind knife that enters the cyclone separator tangentially under the guidance of the flow channel, breaks up small particle agglomerates through the wind knife, and removes fine particles through a small flow of upward airflow to reduce the particle size distribution. These special designs are conducive to improving the removal efficiency of fine particles and improving the yield. Specifically, the advantages of these special designs are:

[0052] 1. The air knife is used to break up the small particles, which is conducive to separating the agglomerated fine particles and ensuring the removal efficiency of fine particles;

[0053] 2. Remove these fine particles through a small upward airflow to prevent the large upward airflow from taking away some large particles, thus ensuring the product yield;

[0054] 3. Through the channel formed between the guide wires, the secondary air is forced to form a tangential air intake wind knife, ensuring the secondary air rotation direction and not destroying the internal flow field of the cyclone separator, thereby improving the removal efficiency of fine particles and product yield.

[0055] 4. The structure design is simple, the manufacturing cost is low, and it is easy to use, providing a simple, convenient, and economically feasible method for achieving gas-solid separation and particle classification at the same time.

[0056] In addition, the secondary air in the utility model adopts gap air intake, and the gas enters the cyclone separator tangentially along the preset flow channel in the secondary air guide ring without destroying the internal rotating flow field; the gas is forced to enter the cyclone separator along the secondary air flow channel in the secondary air guide ring, and the high air velocity and low flow wind knife in the gap can effectively break up the particle agglomerations and avoid the removal of large particles, thereby achieving the removal of small particles with minimal loss of recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a schematic diagram of a cyclone separator and a device with a guide wire bearing ring and a guide wire disclosed in an embodiment of the utility model;

[0058] Figure 2 yes Figure 1 A schematic diagram of another schematic diagram of the method;

[0059] Figure 3 It is a schematic diagram of guide wires with different bending directions (such as convex, linear and concave) and different angles (exemplarily, taking 3 angles as an example) disclosed in multiple embodiments of the utility model;

[0060] The direction of the arrow in the figure is the airflow direction of the secondary air. DETAILED DESCRIPTION

[0061] All features disclosed in this specification, except mutually exclusive features and / or steps, can be combined in any manner. The utility model is described in detail below in conjunction with the accompanying drawings.

[0062] like Figure 1 As shown, it includes four parts from a) to d), among which part a) illustrates a typical tangential introduction cyclone separator, including an upper cylindrical barrel, a lower conical barrel, a gas inlet pipe above the cylindrical barrel, an exhaust pipe inserted into the upper part of the cylindrical barrel, and a discharge port at the bottom of the conical barrel. Before the cyclone separator is modified by the device of the utility model, all particles enter the top of the cyclone separator along the tangential direction with the air flow under the action of the suction of the exhaust port, and then flow downward in a spiral along the inner wall of the cylindrical barrel under the action of gravity and centrifugal force. A part of the gas is discharged from the cyclone separator from the upper exhaust port through the inner vortex, and the remaining gas containing particles forms an outer vortex on the inner wall of the cyclone separator. When approaching the bottom of the separator, the gas flow rate is greatly reduced, and finally, under the action of the suction of the exhaust port, it turns to move upward, forming an inner vortex in the center of the cyclone separator. The inner vortex continuously carries away the gas of the outer vortex during its movement, and a small amount of small particles affected by aerodynamic force are also carried away. The main particles fall into a closed collection tank or a star-shaped discharger or other types of dischargers through the conical bottom outlet of the separator under the action of gravity and are collected as products.

[0063] See also Figure 1 b), c), d) in Figure 2 as well as Figure 3 , which illustrates a secondary air guide ring arranged above the discharge port and between the upper and lower flanges. The secondary air guide ring is composed of one or two guide wire bearing ring pieces and multiple guide wires uniformly attached on a single guide wire bearing ring piece or between two guide wire bearing ring pieces. The inner and outer diameters of the guide wire bearing ring piece are the same as the inner and outer diameters of the connecting flange of the cyclone separator, and the inner and outer ends of the guide wires are respectively located at the inner diameter edge and the outer diameter edge of the guide wire bearing ring piece. The secondary air guide ring includes a plurality of secondary air inlets, each of which has a gap, wherein a gap is formed between each two adjacent guide wires. The channel formed between the guide wires is used to guide the air intake direction, and the arrangement direction of the guide wires is consistent with the airflow direction in the cyclone separator. The shape of the guide wire is a straight line or a curve, and the angle between the radius passing through the outer end of the guide wire and the radius passing through the inner end of the guide wire is 0 to 80°.

[0064] The utility model uses the secondary air inlet to introduce the upward airflow, and uses the high-speed airflow formed by the gap air intake to break the particle agglomeration and further sort the particles before the particles enter the discharge port; at the same time, the guide ring's guide function causes the air to rotate and enter the cyclone separator, avoiding the loss of large particles caused by simple upward airflow. The utility model achieves the removal of small particles while reducing the recovery rate loss, reduces the particle size distribution width, improves the product quality, and provides a simple, convenient, economical and feasible method for achieving gas-solid separation and particle classification at the same time.

[0065] Embodiment 1 of the device with a guide wire bearing ring and a guide wire described in the utility model and the cyclone separator matched therewith:

[0066] In such Figure 1 On the cyclone separator shown, a secondary air guide ring is added to the discharge port at the bottom of the conical cylinder. The guide ring consists of a guide wire and a guide wire bearing ring sheet. The inner diameter of the guide wire bearing ring sheet is 58mm and the outer diameter is 80mm. 16 cylindrical guide wires are evenly arranged on the guide wire bearing ring sheet. The guide wires are placed face down so that the guide wires are axially attached to the guide wire bearing ring sheet. The inclination direction of the guide wire is consistent with the airflow direction in the cyclone separator. The diameter of the guide wire (and thus the height of the gap) is 1mm. The bending direction of the guide wire is convex, and the angle between the radius passing through the outer end of the cylindrical guide wire and the radius passing through the inner end of the guide wire is 45°.

[0067] Embodiment 2 of the device with a guide wire bearing ring and a guide wire described in the utility model and the cyclone separator matched therewith:

[0068] Except for the following parameters, the other parameters are the same as those in Example 1: 8 square guide wires are evenly arranged on the guide wire bearing ring, the guide wire diameter is 1.5 mm, the guide wire is straight, and the angle between the radius passing through the outer end of the guide wire and the radius passing through the inner end of the guide wire is 70°.

[0069] Embodiment 3 of the device with a guide wire bearing ring and a guide wire described in the utility model and the cyclone separator matched therewith:

[0070] Except for the following parameters, the other parameters are the same as those in Example 1: 12 square guide wires are evenly arranged on the guide wire bearing ring, the guide wire diameter is 0.5 mm, the guide wire bending direction is convex, and the angle between the radius passing through the outer end of the guide wire and the radius passing through the inner end of the guide wire is 30°.

[0071] Embodiment 4 of the device with a guide wire bearing ring and a guide wire described in the utility model and the cyclone separator matched therewith:

[0072] Except for the following parameters, the other parameters are the same as those in Example 1: the diameter of the guide wire is 0.7 mm, the guide wire is concave, and the angle between the radius passing through the outer end of the guide wire and the radius passing through the inner end of the guide wire is 20°.

[0073] Furthermore, through experiments, the range of the diameter of the guide wire can be 0.25-3mm, and the range of the angle between the radius passing through the outer end of the guide wire and the radius passing through the inner end of the guide wire can be 0-80°. As mentioned above, in the utility model, the morphological parameters of the gap, and the air velocity and flow rate of the wind knife meet the following constraints: the wind knife does not destroy the rotating flow field inside the cyclone separator, and the wind knife can effectively prevent the large particles inside the cyclone separator from being removed, while breaking up the particle agglomerates and further sorting the particles. Therefore, in specific application scenarios, various parameters such as the appropriate diameter of the guide wire can be selected according to needs.

[0074] Embodiment 5 of the device with a guide wire bearing ring and a guide wire described in the utility model and the cyclone separator matched therewith:

[0075] Except for the following parameters, the other parameters are the same as those in Example 1: the diameter of the guide wire is 3 mm, the outer diameter of the guide wire bearing ring is 188 mm, and the inner diameter is 134 mm.

[0076] It should be noted that the morphological parameters of the gap include: the height of the gap, wherein the height of the gap is equal to the maximum radial dimension of the guide wire. For example, when the cross section of the guide wire is circular, the maximum radial dimension is equal to the diameter of the guide wire.

[0077] Preferably,

[0078] The morphological parameters of the gap include: the width of the gap, wherein the width of the gap is equal to the distance between every two guide wires.

[0079] Preferably,

[0080] When the number of the plurality of guide wires, the shape of the cross section, the width of the gap, and the bending direction and angle thereof remain unchanged, the secondary air guide ring can achieve the sorting of different particles by adjusting the height of the gap.

[0081] Application Example 1

[0082] A small air classification mill was selected, and the end was connected to the device of Example 1 and its matching cyclone separator. The feed material was polyester paint flakes with a diameter of 5-8 mm. The polyester coarse powder coating was prepared at a certain main mill speed and classifier frequency.

[0083] Comparative Application Example 1-1

[0084] A small air classification mill was selected, and the end was connected to the device of Example 1 and its matching cyclone separator, but the guide wire was removed. The raw materials and operating conditions were the same as those of Application Example 1.

[0085] Comparative Application Example 1-2

[0086] A small air classification mill was selected, and a cyclone separator was connected to the end. The size of the cyclone separator was the same as that of the cyclone separator mentioned in Example 1, but the device described in the previous embodiments of the present invention was not used. The raw materials and operating conditions were the same as those in Application Example 1.

[0087] Application Example 2

[0088] A small air classifying mill was selected, and the end was connected to the device of Example 2 and its matching cyclone separator. The feed material was polyester paint flakes with a diameter of 5-8 mm. Polyester fine powder particles were prepared at a certain main mill speed and classifier frequency.

[0089] Comparative Application Example 2

[0090] A small air classification mill was selected, and a cyclone separator was connected to the end. The size of the cyclone separator was the same as that of the cyclone separator mentioned in Example 2, but the device described in the above embodiments of the utility model was not used. The raw materials and operating conditions were the same as those in Application Example 2.

[0091] Application Example 3

[0092] A small air classifying mill was selected, and the end was connected to the cyclone separator in Example 3. The feed material was epoxy paint with a medium particle size of about 37 μm. The main mill and the classifier maintained a low rotation speed so that they did not have a crushing function, and the particles could pass through the classifier of the mill itself and all enter the cyclone separator, so as to examine the removal effect of the present invention on the overfine powder in the coarse powder coating particle product.

[0093] Comparative Application Example 3

[0094] A small air classification mill was selected, and a cyclone separator was connected to the end. The size of the cyclone separator was the same as that of the cyclone separator mentioned in Example 3, but the device described in the above embodiments of the utility model was not used. The raw materials and operating conditions were the same as those in Application Example 3.

[0095] Application Example 4

[0096] A small air classifying mill was selected, and the end was connected to the device of Example 4 and its matching cyclone separator. The feed material was epoxy paint with a medium particle size of about 19 μm. The main mill and the classifier maintained a low speed so that they did not have a crushing function, and the particles could pass through the classifier of the mill itself and all enter the cyclone separator, so as to examine the removal effect of the utility model on the overfine powder in the fine powder coating particle product.

[0097] Comparative Application Example 4-1

[0098] A small air classification mill was selected, and the end was connected to the device of Example 4 and its matching cyclone separator, but the guide wire was removed. The raw materials and operating conditions were the same as those of Application Example 4.

[0099] Comparative Application Example 4-2

[0100] A small air classifying mill was selected, and a cyclone separator was connected to the end. The size of the cyclone separator was the same as that of the cyclone separator mentioned in Example 4, but the device described in the previous embodiments of the utility model was not used. The raw materials and operating conditions were the same as those in Application Example 4.

[0101] Application Example 5

[0102] A production type air classification mill was selected, and the end was connected to the device of Example 5 and its matching cyclone separator. The feed material was polyester paint flakes with a diameter of 5-8 mm. Polyester fine powder particles were prepared at a certain main mill speed and classifier frequency.

[0103] Comparative Application Example 5

[0104] A production type air classification mill was selected, and a cyclone separator was connected to the end. The size of the cyclone separator was the same as that of the cyclone separator mentioned in Example 5, but the device described in the above embodiments of the present invention was not used. The raw materials and operating conditions were the same as those in Application Example 5.

[0105] The effect of the cyclone separator modification is shown by comparing the small particle size, particle size distribution and recovery rate of the product under different conditions. 10 It means that the volume of particles smaller than this size accounts for 10% of the total volume of particles. 50 Indicates that particles larger or smaller than this value each account for 50%, D 90 It means that the volume of particles smaller than this size accounts for 90% of the total volume of particles. 90 -D 10 ) / D 50 Used to indicate particle size distribution. In order to fully verify the classification effect of the cyclone separator, the utility model uses both flake and powder feeds, and controls the products to be inspected within the range of coarse powder and fine powder particles.

[0106] Table 1

[0107]

[0108] As shown in Table 1, taking Application Example 1, Comparative Application Example 1-1, and Comparative Application Example 1-2 as examples, the device and method of the utility model, Application Example 1 has an excellent effect of removing excessively fine particles compared with Comparative Application Example 1-2. For various types of raw materials, the D representing small particles is 10 Both increased, indicating that the span of the particle size distribution was greatly reduced, and the extent of the reduction in recovery rate was within an acceptable range; while for comparative application example 1-1, although compared with comparative application example 1-2, D 10 As the pressure increases, the span decreases, but the recovery rate decreases significantly, and the cost will increase significantly because of the large waste; and the span of Application Example 1 is the lowest among Application Example 1, Comparative Application Example 1-1, and Comparative Application Example 1-2, indicating that the classification effect is the best. Taking Application Example 1 and Comparative Application Example 1-1 as examples, compared with the application scheme with a guide wire bearing ring and secondary air intake but no guide wire, the particle distribution obtained by the device and method of the utility model is narrower and has a higher product recovery rate. In summary, the utility model reduces the distribution width of the particles without increasing additional energy consumption with a simple and low-cost scheme, realizes the classification of particles, and reduces the yield loss caused by secondary air classification in conventional equipment.

[0109] The above is an embodiment of the present invention. The present invention is not limited to the above embodiments, and anyone should be aware that any structural changes made under the enlightenment of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention.

Claims

1. A device having a guide wire bearing ring and a guide wire, characterized in that: The device comprises: A secondary air guide ring, comprising: a guide wire bearing ring sheet for bearing a plurality of guide wires, and a plurality of guide wires, wherein: The guide wire bearing ring is a sheet-shaped circular ring having inner and outer diameters. The guide wire is used to form a secondary air flow channel.

2. The device according to claim 1, characterized in that A gap is formed between every two adjacent guide wires.

3. The device according to claim 1, characterized in that The guide wire bearing ring piece is a single guide wire bearing ring piece or two guide wire bearing ring pieces facing each other.

4. The device according to claim 3, characterized in that When the guide wire bearing ring piece is a single guide wire bearing ring piece, a plurality of guide wires are uniformly attached to the guide wire bearing ring piece along the axial direction thereof.

5. The device according to claim 3, characterized in that When the guide wire bearing ring pieces are two guide wire bearing ring pieces, a plurality of guide wires are evenly attached between two opposite guide wire bearing ring pieces along their axial direction.

6. The device according to claim 1, characterized in that The secondary air guide ring is arranged above the discharge port of the cyclone separator via a flange.

7. The device according to claim 6, characterized in that The inner and outer diameters of the guide wire bearing ring sheet are the same as the inner and outer diameters of the flange.

8. The device according to claim 1, characterized in that The inner end and the outer end of each guide wire are respectively located at the inner diameter edge and the outer diameter edge of the guide wire bearing ring sheet.

9. The device according to claim 1, characterized in that The cross section of the guide wire is circular, square or other shapes.

10. The device according to claim 1, characterized in that The bending direction of the guide wire is convex, straight or concave.

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