Small V-selection device

Abstract

Powder can fly again through a material raising inclined plate so that falling of the powder can be slowed down, the powder can stay in a V-selection cavity for a longer time and can be fully screened, during feeding, a cold air valve is opened to feed air into the V-selection cavity, compensation air can flow towards a dust collector after entering the V-selection cavity through the dust collector, and the compensation air can flow into the V-selection cavity through the dust collector. Compensation air flows through the material raising inclined plate from the first fine powder channel between the flow guide plates on one side and then drives qualified fine powder to move to the fine powder outlet from the first fine powder channel between the flow guide plates on the other side, screening of the qualified fine powder in the powder is achieved, and the flow guide plates can scatter the powder again. According to the device, the internal space of the V-shaped separation cavity is effectively utilized, the powder can be fully screened in the V-shaped separation cavity through cooperation of a material raising inclined plate and a flow guide plate, the fine powder screening effect is improved, and meanwhile the powder separation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of V-type powder separators, in particular to a small V-type separation device. Background Art

[0002] In the cement production process, the materials are ground by a roller press and then enter a disintegrator. The cake-shaped materials are disintegrated by the disintegrating plates in the disintegrator. After disintegration, the powdered materials still have uneven thickness. To ensure that the materials reach the fineness and uniformity required for production, the disintegrated powder falls onto a sieve plate. The coarse powder and qualified fine powder are screened through the sieve plate. The screened coarse powder returns to the weighing bin through the return powder pipe and enters the roller press for secondary grinding together with the original materials. The qualified fine powder falls through the sieve holes and enters the subsequent process. However, the screening efficiency of the sieve plate for the coarse and fine powders is poor. Approximately 30% of the fine powder cannot be screened out by the sieve plate and returns to the weighing bin together with the coarse powder, seriously affecting the efficiency of the roller press.

[0003] In order to separate the qualified fine powder in the materials, the V-type powder separator uses air flow to make the materials collide back and forth between the two side baffle plates, achieving the effect of disintegrating the materials and screening the fine powder, making the operation of the roller press more stable. At present, the large V-type separator utilizes its internal space to enable the materials to have a relatively sufficient screening time during the falling process. However, for the small V-type separator, the small internal space results in too short a screening time for the materials, seriously affecting the powder separation efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a small V-type separation device to solve the problem that the too short screening time caused by the small internal space of the small V-type separation device seriously affects the powder separation efficiency.

[0005] To solve the above technical problems, the utility model provides a small V-type separation device, including a feed pipe. The feed pipe is connected with a V-type separation cavity. At the position corresponding to the outlet of the feed pipe in the V-type separation cavity, a vertically distributed lifting inclined plate is arranged. The lifting inclined plate is fixed to one side inner wall of the V-type separation cavity. A plurality of guide plates are fixed in the V-type separation cavity on both sides of the lifting inclined plate. The guide plates on the same side are arranged in a vertical stepped manner. A first fine powder channel is formed between two adjacent guide plates on the same side. A cold air valve is arranged on one side of the top of the V-type separation cavity. The cold air valve is located on the side of the guide plate away from the lifting inclined plate. A dust collector is installed at the fine powder outlet on the other side of the top of the V-type separation cavity.

[0006] It should be noted in the solution that the V-type separation cavity includes a screening cavity formed between the two side guide plates. The side of the guide plate close to the cold air valve is an air inlet cavity. The side of the guide plate close to the dust collector is a discharge cavity. The height of the air inlet cavity is lower than the height of the screening cavity.

[0007] As a preferred embodiment, the top sides of the screening chamber and the air inlet chamber both slope downward and have the same inclination angle, and the material lifting inclined plate is parallel to the top side of the screening chamber.

[0008] As a preferred embodiment, two vertically distributed long diversion plates are inclined in the screening chamber, and a second fine powder channel is formed between the two long diversion plates.

[0009] Furthermore, it is worth noting that the long diversion plate is parallel to the connection line between the same-side end points of each material lifting inclined plate.

[0010] As a preferred embodiment, the inclination angle of each material lifting inclined plate is 30 - 45°.

[0011] As a preferred embodiment, the included angle formed between the diversion plate and the connection line of the same-side end points of each material lifting inclined plate is 8 - 15°.

[0012] Furthermore, it is worth noting that it further includes a disintegrator. A sieve plate is arranged at the discharge port of the disintegrator. One side of the disintegrator close to the sieve plate is connected with a coarse powder return pipe, and the coarse powder return pipe is connected with the feed pipe. The bottom of the V - separator cavity is connected with a weighing bin.

[0013] Compared with the prior art, a small V - separator provided by the present utility model at least includes the following

[0014] Beneficial effects:

[0015] The powder material entering the V - separator cavity through the feed pipe falls and impacts on the material lifting inclined plate inclined in the V - separator cavity, which can make the powder material fly again to slow down the falling of the powder material, so that the powder material can stay in the V - separator cavity for a longer time and be more fully screened. When feeding, the cold air valve on one side of the top of the V - separator cavity feeds air into the V - separator cavity. The compensation air blows from the first fine powder channel formed between the diversion plates on one side of the material lifting inclined plate to each material lifting inclined plate, blowing the powder material falling along the inclination angle of the material lifting inclined plate and the powder material flying after colliding with the material lifting inclined plate to each diversion plate. The powder material can be further disintegrated while colliding with the diversion plate. At the same time, through the suction of the dust collector, the compensation air enters the V - separator cavity and flows towards the dust collector. The compensation air flows from the first fine powder channel between the diversion plates on one side, passes through the material lifting inclined plate, and then moves the qualified fine powder through the first fine powder channel between the diversion plates on the other side to the fine powder outlet, and is sent to the subsequent processing link by the dust collector, realizing the screening of the qualified fine powder in the powder material. The coarse powder that cannot pass through the first fine powder channel in the powder material returns from the bottom of the V - separator cavity for re - grinding. This small V - separator effectively utilizes the internal space of the V - separator cavity. Through the cooperation of the material lifting inclined plate and the diversion plate, the powder material can be fully screened in the V - separator cavity, improving the fine powder screening effect while enhancing the powder selection efficiency, and avoiding the repeated entry of fine powder into the roller press, which affects the working efficiency of the roller press. Brief Description of the Drawings

[0016] To more clearly illustrate the technical solution of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of a small V - selection device provided by the present utility model;

[0018] Figure 2 Schematic diagram of the powder and compensation air flow directions of a small V - selection device provided by the present utility model;

[0019] In the figure: 1, feed pipe; 2, V - selection cavity; 200, screening cavity; 210, air inlet cavity; 220, discharge cavity; 3, lifting inclined plate; 4, guide plate; 5, first fine powder channel; 6, cold air valve; 7, dust collector; 8, long guide plate; 9, second fine powder channel; 10, coarse powder return pipe; 11, weighing bin. Detailed Embodiments

[0020] In order to enable those skilled in the art to better understand the technical solution in the present utility model, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0021] The core of the present utility model is to provide a small V - selection device, which solves the problem that the screening time is too short due to the small internal space of the small V - selection device, seriously affecting the powder selection efficiency.

[0022] Figure 1 Structural schematic diagram of a small V - selection device provided by the present utility model, Figure 1 Schematic diagram of the powder and compensation air flow directions of a small V - selection device provided by the present utility model, see Figures 1 to 2 as shown.

[0023] Embodiment 1

[0024] A small V - selection device includes a feed pipe 1 connected to the V - selection cavity 2. The powder to be screened enters the V - selection cavity 2 from the feed pipe 1. It should be noted that the V - selection cavity 2 is a V - shaped groove structure. Refer to Figure 1, a lifting inclined plate 3 is vertically arranged in the V - selection cavity 2. Each lifting inclined plate 3 is inclined and fixed at the position on the inner wall of one side of the V - selection cavity 2 corresponding to the outlet of the feed pipe 1. When the falling powder collides with the lifting inclined plate 3, the powder can be made to fly again, thereby slowing down the falling of the powder, increasing the residence time of the powder to be screened in the V - selection cavity 2, enabling the powder to be more fully screened. A cold air valve 6 is arranged on one side of the top of the V - selection cavity 2. While the feed pipe 1 is feeding, the cold air valve 6 is opened to let air into the V - selection cavity 2. A dust collector 7 is installed at the fine powder outlet on the other side of the top of the V - selection cavity 2. Through the dust collector 7, the compensation air entering from the cold air valve 6 can flow in the V - selection cavity 2 towards the fine powder outlet. The dust collector 7 can be a bag - type dust collector. A plurality of flow - guiding plates 4 are fixed in the V - selection cavity 2 on both sides of the lifting inclined plate 3. The flow - guiding plates 4 on the same side are arranged in a vertical stepped shape. A first fine powder passage 5 is formed between two adjacent flow - guiding plates 4 on the same side. The cold air valve 6 is located on the side of the flow - guiding plate 4 away from the lifting inclined plate 3. Refer to Figure 2 , the compensation air blows from the first fine powder passage 5 between the flow - guiding plates 4 on the side close to the cold air valve 6 towards the lifting inclined plate 3, and contacts and collides with the powder falling along the inclination angle of the lifting inclined plate and the powder flying after colliding with the lifting inclined plate. The powder is scattered again by hitting the flow - guiding plates 4 on both sides of the lifting inclined plate 3 under the action of the compensation air, which can avoid affecting the screening effect due to the non - dispersion of the powder. Then, during the process of the compensation air flowing towards the dust collector 7, the qualified fine powder flows from the first fine powder passage 5 between the flow - guiding plates 4 on the side away from the cold air valve 6 to the fine powder outlet and is sent to the subsequent processing link through the dust collector, thereby realizing the screening of the qualified fine powder in the powder. The coarse powder that cannot pass through the first fine powder passage 5 finally falls to the bottom of the V - selection cavity 2 and returns for re - grinding. The above structural design can effectively utilize the internal space of the V - selection cavity 2. Through the cooperation of the lifting inclined plate 3 and the flow - guiding plate 4, the powder is fully screened in the V - selection cavity 2, improving the screening effect of the fine powder and enhancing the powder - selection efficiency at the same time.

[0025] Specifically, the V - selection cavity 2 can be divided into three regions by two vertical columns of flow - guiding plates 4. See Figure 1, a screening chamber 200 is formed between the two flow guiding plates 4 on both sides. The screening chamber 200 is restricted by the flow guiding plates 4 on both sides to form a screening space where the compensating air continuously contacts the powder. In cooperation with the material lifting inclined plate 3, the powder to be screened can be fully dispersed and stay for enough time in the screening chamber 200 to be fully screened. The side of the flow guiding plate 4 close to the cold air valve 6 is the air inlet chamber 210, and the side of the flow guiding plate 4 close to the dust collector 7 is the discharge chamber 220. The height of the air inlet chamber 210 is lower than that of the screening chamber 200. When the compensating air flows from the air inlet chamber 210 to the screening chamber 200, it has an upward inclined flow trend, which can not only ensure the dispersion effect of the powder but also further increase the residence time of the powder in the screening chamber 200. In some preferred implementation modes, the top sides of the screening chamber 200 and the air inlet chamber 210 are both inclined downward and have the same inclination angle. The material lifting inclined plate 3 is parallel to the top side of the screening chamber 200. Refer to Figure 1 and Figure 2 , the compensating air flows through the screening chamber 200 from the air inlet chamber 210, and then takes the qualified powder to the dust collector 7 at the top of the V - separator body 2. The air flow direction in the whole process remains upward and inclined, and the flow direction will not be blocked by the inner wall of the V - separator body 2. The flow direction of the compensating air can flow parallel to the material lifting inclined plate 3, which can ensure the full contact between the compensating air and the material, thus guaranteeing the dispersion and screening effect of the material.

[0026] Embodiment 2

[0027] On the basis of Embodiment 1, preferably, two vertically distributed long flow guiding plates 8 are inclined in the screening chamber 200. Refer to Figure 1 and Figure 2 , a second fine powder channel 9 is formed between the two long flow guiding plates 8. The material lifting inclined plate 3, the flow guiding plate 4 and the long flow guiding plate 8 can be rectangular plates or parallelogram plates. Through the long flow guiding plates 8, the powder screened by the screening chamber 200 can be screened for the second time to ensure the quality of the fine powder finally flowing to the dust collector 7. Further, the long flow guiding plates 8 are parallel to the connecting line between the same - side end points of each material lifting inclined plate 3. The qualified powder at the material lifting inclined plate 3 enters the discharge chamber 220 from the first fine powder channel 5, impacts on the long flow guiding plates 8, and once again ensures that the powder is fully dispersed. The fine powder with qualified quality is sent to the dust collector 7 through the second fine powder channel 9 under the drive of the compensating air. The fine powder with unqualified quality that still cannot pass through the second fine powder channel 9 after being dispersed again will also fall to the bottom of the V - separator body 2 and return for re - grinding, further improving the quality of the screened fine powder.

[0028] During the actual installation process, the feed pipe 1 of the small V - separator is connected to the coarse powder return pipe 10 of the disintegrator. After the cake - shaped material ground by the roller press is disintegrated by the disintegrator, it is first subjected to the first - batch powder selection through the sieve plate arranged at the discharge port of the disintegrator. The disintegrator and the sieve plate are not shown in the attached drawings. The qualified fine powder falling through the sieve holes is directly sent to the subsequent processing process, and the unqualified powder enters the V - separator cavity 2 through the feed pipe 1 from the coarse powder return pipe 10 connected to the side of the sieve plate of the disintegrator for the second - batch powder selection, avoiding the repeated entry of fine powder into the roller press, which affects the working efficiency of the roller press and improves the powder selection efficiency. The unqualified coarse powder determined after the second - batch powder selection enters the weighing bin 11 connected to the bottom of the V - separator cavity 2 and returns to the roller press for grinding again through the weighing bin 11.

[0029] Verified by practice, preferably, the inclination angle of each lifting inclined plate 3 is 30 - 45°, that is, the angle between the lifting inclined plate 3 and the horizontal line is 30 - 45°. Further, the angle formed between the connecting line of the same - side end points of the deflector 4 and each lifting inclined plate 3 is 8 - 15°, that is, the inclination angle of the deflector 4 is the angle formed by the connecting line between its end point and the end point of the same - side lifting inclined plate 3. After setting the inclination angles of the lifting inclined plate 3 and the deflector 4 as above, the lifting inclined plate 3 and the deflector 4 cooperate with the powder in the coarse powder return pipe 10 for the second - batch powder selection, and the amount of fine powder in the powder that originally returned to the roller press for re - grinding through the weighing bin 11 can be reduced from 30% to less than 20%, effectively improving the working efficiency of the roller press and being beneficial to increasing the mill hourly output and reducing energy consumption.

[0030] The powder material entering the V - selection cavity 2 through the feeding pipe 1 of the present utility model falls and impacts on the material - lifting inclined plate 3 which is inclinedly arranged in the V - selection cavity 2, and can make the powder material fly again to slow down the falling of the powder material, so that the powder material can stay in the V - selection cavity 2 for a longer time and be more fully screened. When feeding, the cold air valve 6 on one side of the top of the V - selection cavity 2 feeds air into the V - selection cavity 2. The compensation air blows from the first fine - powder channel 5 formed between the guide plates 4 on one side of the material - lifting inclined plate 3 to each material - lifting inclined plate 3, and blows the powder material falling along the inclination angle of the material - lifting inclined plate 3 and the powder material flying after colliding with the material - lifting inclined plate 3 towards each guide plate 4. The powder material can be further dispersed while colliding with the guide plate 4. At the same time, due to the suction of the dust collector 7, the compensation air enters the V - selection cavity 2 and flows towards the dust collector 7. The compensation air flows through the first fine - powder channel 5 between one - side guide plates 4, passes through the material - lifting inclined plate 3, and then carries the qualified fine powder to move through the first fine - powder channel 5 between the other - side guide plates 4 to the fine - powder outlet, and is sent to the subsequent processing link through the dust collector 7, realizing the screening of the qualified fine powder in the powder material. The coarse powder that cannot pass through the first fine - powder channel 5 in the powder material returns from the bottom of the V - selection cavity 2 for re - grinding. This small - sized V - selection device effectively utilizes the internal space of the V - selection cavity 2. Through the cooperation of the material - lifting inclined plate 3 and the guide plate 4, the powder material can be fully screened in the V - selection cavity 2, improving the fine - powder screening effect and at the same time enhancing the powder - selection efficiency, and avoiding the repeated entry of fine powder into the roller press and affecting the working efficiency of the roller press.

[0031] After considering the specification and the practice of the application disclosed herein, those skilled in the art will readily conceive of other embodiments of the present utility model. The present utility model is intended to cover any variations, uses, or adaptations of the present utility model, which follow the general principles of the present utility model and include the common general knowledge or conventional technical means in the technical field disclosed by the present utility model. The specification and the embodiments are only regarded as exemplary, and the true scope of the present utility model is pointed out by the claims.

[0032] It should be understood that the present utility model is not limited to the precise structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above - described embodiments of the present utility model do not constitute a limitation on the protection scope of the present utility model.

Claims

1. A small V-selection device, characterized in that, Comprising: A feed pipe (1), the feed pipe (1) is connected to a V - selection cavity (2), at a position corresponding to the outlet of the feed pipe (1) inside the V - selection cavity (2), a vertically - distributed material - lifting inclined plate (3) is arranged, the material - lifting inclined plate (3) is fixed to one inner wall side of the V - selection cavity (2), a plurality of guide plates (4) are fixed inside the V - selection cavity (2) on both sides of the material - lifting inclined plate (3), the guide plates (4) on the same side are arranged in a vertical stepped manner, a first fine - powder channel (5) is formed between two adjacent guide plates (4) on the same side, on one side of the top of the V - selection cavity (2), a cold - air valve (6) is arranged, the cold - air valve (6) is located on the side of the guide plate (4) away from the material - lifting inclined plate (3), and a dust collector (7) is installed at the fine - powder outlet on the other side of the top of the V - selection cavity (2).

2. The small V-selection device according to claim 1, characterized in that, The V - selection cavity (2) includes a screening cavity (200) formed between the guide plates (4) on both sides, the side of the guide plate (4) close to the cold - air valve (6) is an air - inlet cavity (210), the side of the guide plate (4) close to the dust collector (7) is a discharge cavity (220), and the height of the air - inlet cavity (210) is lower than the height of the screening cavity (200).

3. A small V-selection device according to claim 2, characterized in that, The top sides of both the screening cavity (200) and the air - inlet cavity (210) are inclined downward and have the same inclination angle, and the material - lifting inclined plate (3) is parallel to the top side of the screening cavity (200).

4. A small V-selection device according to claim 3, characterized in that, Two vertically - distributed long guide plates (8) are inclinedly arranged inside the screening cavity (200), and a second fine - powder channel (9) is formed between the two long guide plates (8).

5. The small V-selection device according to claim 4, characterized in that, The long guide plate (8) is parallel to the connection line between the same - side end points of each material - lifting inclined plate (3).

6. A small V-selection device according to claim 5, characterized in that, The inclination angle of each material - lifting inclined plate (3) is 30 - 45°.

7. A small V-selection device according to claim 3, characterized in that, The included angle formed between the guide plate (4) and the connection line of the same - side end points of each material - lifting inclined plate (3) is 8 - 15°.

8. A small V-selection device according to any one of claims 1-7, characterized in that Also comprising: A disintegrator, a sieve plate is arranged at the discharge port of the disintegrator, a coarse - powder return pipe (10) is connected to the side of the disintegrator close to the sieve plate, the coarse - powder return pipe (10) is connected to the feed pipe (1), and a weighing bin (11) is connected to the bottom of the V - selection cavity (2).

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