Coarse and fine pulverized coal separator for thermal power plant

Abstract

The utility model discloses a thermal power plant pulverized coal coarse and fine separator which comprises a supporting seat, an installation groove is formed in the top of the supporting seat, a separation box used for separating pulverized coal coarse and fine is fixedly installed in the installation groove, a screening plate is arranged in the separation box, and vibrators are installed at the positions, located at the bottom of the screening plate, of the two corresponding inner walls of the separation box. Material stirring assemblies used for stirring coal in a reciprocating mode are symmetrically arranged at the positions, above the screening plate, in the separating box, coarse coal collecting boxes are arranged at the positions, located on the two side walls of the separating box, of the top of the supporting base, discharging openings are formed in the two corresponding side walls of the separating box, and the discharging openings communicate with the interiors of the coarse coal collecting boxes. According to the coarse and fine pulverized coal separator, coal stacked at the lower end of the screening plate can be pushed to move upwards through the arrangement of the material shifting assembly during coal separation, so that the coal is vibrated and screened for a long time in the upward moving and falling process on the screening plate, fine pulverized coal is completely screened off, and the high-quality separation effect of the pulverized coal is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of separator, concretely to a coal powder coarse and fine separator of thermal power plant. BACKGROUND

[0002] The coal powder separator is one of the most important equipment in the coal mill pulverizing system of the thermal power plant, and the coal powder is formed by crushing the lump coal. Because the wood material that is not completely mineralized often exists in the coal, the wood material forms the fiber with different lengths and mixes in the coal powder when the coal is ground. The coal powder mixed with the fiber directly affects the use effect, so the coal powder separator is used to separate the coal powder.

[0003] According to the patent number CN 220048939 U, a coal powder coarse and fine separator of thermal power plant is disclosed. The filter screen is arranged in the box body, the coal powder enters the box body or passes through the filter screen for filtering, and the vibrator vibrates the filter screen, so that the fine coal powder is collected at the bottom end of the box body. However, the distance between the filter screen and the box body is short, and the coal powder is quickly accumulated at the bottom end of the filter screen under the action of the vibrator after being placed on the filter screen. Therefore, the fine coal powder cannot be completely screened out, and the separation effect is poor. Moreover, the existing coal powder coarse and fine separator has a small separation capacity for the coal powder, and the separation efficiency is low. Therefore, a coal powder coarse and fine separator of thermal power plant is proposed. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a coal powder coarse and fine separator of thermal power plant to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a coal powder coarse and fine separator of thermal power plant, comprising a support seat, a mounting groove is formed in the top of the support seat, and a separation box for separating the coarse and fine coal powder is fixedly installed in the mounting groove. A screening plate is arranged in the separation box, and a vibrator is installed at the bottom of the screening plate corresponding to the two inner walls of the separation box. A raking assembly for reciprocating raking the coal is symmetrically arranged above the screening plate in the separation box. Coarse coal collection boxes are arranged on the two side walls of the separation box at the top of the support seat. Discharge ports are formed in the corresponding two side walls of the separation box, and the discharge ports are in communication with the interiors of the coarse coal collection boxes. A plugging assembly for controlling the opening and closing of the discharge ports is arranged at the top of the coarse coal collection boxes.

[0006] Preferably, the two side surfaces of the screening plate are in a slope structure, and the height value of the middle part of the screening plate is higher than that of the two end parts. An upper box is installed in the separation box, and a discharge cylinder is arranged at the bottom of the upper box. The discharge cylinder is located directly above the screening plate. The two inner walls of the separation box are integrally provided with protrusions. The vibrator is fixedly installed at the top of the protrusions, and the output end of the vibrator is connected with the screening plate.

[0007] Preferably, the stirring assembly comprises an electric telescopic rod, a mounting plate, a screw rod and a stirring plate, the top of the separation box is symmetrically provided with the electric telescopic rod, the piston rod end of the electric telescopic rod extends into the separation box and is fixedly connected with the mounting plate, the mounting plate is arranged obliquely, the screw rod is rotatably connected in the mounting plate, and the end of the mounting plate is fixedly provided with a servo motor, the output shaft end of the servo motor extends into the mounting plate and is fixed with the screw rod, the outer side of the screw rod is threadedly connected with a sliding block, the bottom of the sliding block is integrally connected with the stirring plate, and the two stirring plates are located above the two inclined surfaces of the screening plate respectively.

[0008] Preferably, the mounting plate is symmetrically fixedly connected with limiting rods, the two ends of the sliding block are symmetrically provided with limiting holes, and the two limiting rods are slidably connected in the two limiting holes of the sliding block.

[0009] Preferably, the blocking assembly comprises a blocking plate, the top of the coarse coal collecting box is provided with a sliding groove, and the blocking plate is slidably connected in the sliding groove, the blocking plate is blocked on the surface of the discharge port, the top of the coarse coal collecting box is fixedly connected with an L-shaped plate, the L-shaped plate is rotatably connected with a lifting lead screw, the top of the L-shaped plate is provided with a driving motor, the output shaft end of the driving motor is fixed with the lifting lead screw, one end of the blocking plate located outside the coarse coal collecting box is integrally provided with a lifting block, and the lifting block is threadedly connected on the outer side of the lifting lead screw.

[0010] Preferably, the cross section of the bottom end of the separation box is in an inverted isosceles trapezoidal structure, the bottom of the separation box is provided with a discharge cylinder, and the outer side of the discharge cylinder is provided with a control valve for controlling the opening and closing of the discharge cylinder.

[0011] Preferably, the bottom of the supporting seat is provided with supporting legs at four corners, and the bottom of the supporting leg is provided with a supporting foot.

[0012] Preferably, the side walls of the separation box, the feeding box and the coarse coal collecting box are provided with observation windows in the vertical direction.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1、The setting of the stirring assembly can push the coal accumulated at the lower end of the screening plate to move upward when the coal is separated, so that the coal is vibrated and screened for a long time during the upward movement and falling on the screening plate, the fine coal powder is completely screened out, and the high-quality separation effect of the coal powder is realized.

[0015] 2、The screening plate is provided with slope surfaces on two sides, the coal can be screened from the two sides of the screening plate, a large amount of coal can be screened at one time, and the separation effect of the coal is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1It is the sectional view structure schematic view of the utility model;

[0017] Figure 2 It is the overall view structure schematic view of the utility model;

[0018] Figure 3 It is the sectional view structure schematic view of the utility model's separation box front view;

[0019] Figure 4 It is the mounting plate internal structure schematic view of the utility model.

[0020] In the drawing: 1, support seat; 2, separation box; 3, feeding box; 4, screening board; 5, discharge cylinder; 6, poking assembly; 7, discharge cylinder; 8, control valve; 9, electric telescopic rod; 10, plugging assembly; 11, coarse coal collection box; 12, discharge port; 13, servo motor; 14, mounting plate; 15, screw; 16, sliding block; 17, poking plate; 18, L-shaped plate; 19, lifting screw; 20, driving motor; 21, plugging plate; 22, vibrator; 23, support leg. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a pulverized coal coarse and fine separator of thermal power plant, including support seat 1, support seat 1 top is provided with mounting groove, and mounting groove is fixedly installed with the separation box 2 for separating the coarse and fine of coal powder, separation box 2 is provided with and screening board 4, and separation box 2 corresponding two inner walls are located at the bottom of screening board 4 and are equipped with vibrator 22.

[0023] It should be noted that the top end of the screening board 4 is obtuse, and the height of the two ends of the screening board 4 is lower, which can screen a large amount of coal at one time, improving the separation efficiency of the coal.

[0024] Symmetrically arranged above the screening board 4 in the separation box 2 is a poking assembly 6 for reciprocating the coal, and the support seat 1 top is provided with a coarse coal collection box 11 on both sides of the separation box 2, and the separation box 2 is provided with a discharge port 12 on both sides, and the discharge port 12 is in communication with the inside of the coarse coal collection box 11, and the coarse coal collection box 11 is provided with a plugging assembly 10 for controlling the opening and closing of the discharge port 12.

[0025] It should be noted that the setting of the coarse coal collection box 11 facilitates the collection of the separated coarse coal, and the discharge port 12 is located at the lower part of the screening plate 4, so that when the discharge port 12 is opened, the coarse coal can be placed in the coarse coal collection box 11 through the discharge port 12.

[0026] The two side surfaces of the screening plate 4 are in a slope structure, and the height value of the middle part of the screening plate 4 is higher than the height values of the two end parts of the screening plate 4. The separation box 2 is provided with the feeding box 3, and the bottom of the feeding box 3 is provided with the discharge cylinder 5 which is located directly above the screening plate 4. The corresponding two inner walls of the separation box 2 are integrally provided with protrusions, and the vibrator 22 is fixedly installed on the top of the protrusion, and the output end of the vibrator 22 is connected with the screening plate 4.

[0027] It should be noted that the to-be-separated coal powder in the feeding box 3 is placed on the top of the screening plate 4 through the discharge cylinder 5, and at the same time, the electric telescopic rod 9 works to control the downward movement of the stirring assembly 6, so that the bottom end of the stirring plate 17 in the stirring assembly 6 approaches the screening plate 4. The coal is divided into two routes and moves on the two inclined surfaces of the screening plate 4. At this time, the vibrator 22 works to make the screening plate 4 vibrate, and the coal on the screening plate 4 is screened on one side to make the fine coal powder fall to the bottom end of the separation box 2.

[0028] The stirring assembly 6 comprises the electric telescopic rod 9, the mounting plate 14, the screw rod 15, and the stirring plate 17. The top of the separation box 2 is symmetrically provided with the electric telescopic rod 9, and the piston rod end of the electric telescopic rod 9 extends into the separation box 2 to be fixedly connected with the mounting plate 14. The mounting plate 14 is arranged in an inclined manner. The mounting plate 14 is rotatably connected with the screw rod 15, and the end of the mounting plate 14 is fixedly provided with the servo motor 13. The output shaft end of the servo motor 13 extends into the mounting plate 14 to be fixed with the screw rod 15. The outer side of the screw rod 15 is threadedly connected with the sliding block 16, and the bottom of the sliding block 16 is integrally connected with the stirring plate 17. The two stirring plates 17 are respectively located above the two inclined surfaces of the screening plate 4.

[0029] It should be noted that the to-be-separated coal powder in the feeding box 3 is placed on the top of the screening plate 4 through the discharge cylinder 5, and the coal is divided into two routes and moves on the two inclined surfaces of the screening plate 4. At this time, the vibrator 22 works to make the screening plate 4 vibrate, and the coal on the screening plate 4 is screened on one side to make the fine coal powder fall to the bottom end of the separation box 2. The large particles are accumulated at the lower end position of the screening plate 4. At this time, the servo motor 13 works to control the rotation of the screw rod 15, so that the stirring plate 17 moves along the inclined surface of the screening plate 4 through the threaded connection of the sliding block 16 and the screw rod 15. At the same time, the vibrator 22 works, and the stirring plate 17 moves to the top end and then slowly returns. In this process, the coal slowly reciprocates on the screening plate 4, so that the fine coal powder mixed in the coal is completely screened and falls into the bottom end of the separation box 2.

[0030] Symmetrical limit rods are fixedly connected in the installation plate 14, limit holes are symmetrically formed in two ends of the sliding block 16, and the two limit rods are slidably connected in the two limit holes of the sliding block 16.

[0031] It should be noted that the limit rods ensure that the sliding block 16 is more stable in sliding on the installation plate 14, thereby realizing the stable stirring of the coal material by the stirring plate 17.

[0032] The plugging assembly 10 comprises a plugging plate 21, a sliding groove is formed in the top of the coarse coal collecting box 11, and the plugging plate 21 is slidably connected in the sliding groove; the plugging plate 21 is arranged on the surface of the discharge port 12; the L-shaped plate 18 is fixedly connected to the top of the coarse coal collecting box 11; the L-shaped plate 18 is rotatably connected to the lifting lead screw 19; the driving motor 20 is arranged on the top of the L-shaped plate 18; the output shaft of the driving motor 20 is fixed to the lifting lead screw 19; the lifting block is integrally arranged at one end of the plugging plate 21 which is located outside the coarse coal collecting box 11; and the lifting block is threadedly connected to the outer side of the lifting lead screw 19.

[0033] It should be noted that when the utility model is used, the coal powder to be separated in the feeding box 3 is placed on the top of the screening plate 4 through the discharge cylinder 5, and the electric telescopic rod 9 is controlled to work to control the downward movement of the stirring assembly 6, so that the bottom end of the stirring plate 17 in the stirring assembly 6 is close to the screening plate 4; the coal material is divided into two paths and moves on the two inclined surfaces of the screening plate 4; at this time, the vibrator 22 is controlled to work to make the screening plate 4 vibrate; the coal material is screened on the screening plate 4, so that the fine coal powder falls to the bottom end of the separation box 2, and the large particles are accumulated at the lower end position of the screening plate 4; at this time, the servo motor 13 is controlled to work to control the rotation of the screw rod 15, so that the stirring plate 17 moves along the inclined surface of the screening plate 4 through the threaded connection between the sliding block 16 and the screw rod 15; the coal material accumulated at the bottom end of the screening plate 4 can be pushed on the surface of the screening plate 4; at the same time, the vibrator 22 is controlled to work; the stirring plate 17 moves to the top end and then slowly returns; in this process, the coal material slowly reciprocates on the screening plate 4, so that the fine coal powder mixed in the coal material is all screened and falls to the bottom end in the separation box 2; after the screening is completed, the driving motor 20 on both sides is controlled to work to make the lifting lead screw 19 rotate, so as to control the upward movement of the plugging plate 21, so that the discharge port 12 is opened, and the relatively coarse coal material falls into the coarse coal collecting box 11 for collection.

[0034] The cross section of the bottom end of the separation box 2 is in an inverted isosceles trapezoidal structure, and the bottom of the separation box 2 is provided with a discharge cylinder 7; the outer side of the discharge cylinder 7 is provided with a control valve 8 for controlling the opening and closing of the discharge cylinder 7.

[0035] It should be noted that the control valve 8 is arranged to facilitate the opening and closing of the discharge cylinder 7, and the discharge cylinder 7 is arranged to facilitate the discharge and collection of the fine coal material separated in the separation box 2.

[0036] The bottom of the support seat 1 is provided with support legs 23 at four corners, and the bottom of the support leg 23 is provided with a support foot.

[0037] It should be noted that the matching arrangement of the support legs 23 and the support feet serves to stably support the support base 1, thereby ensuring the stability of the device.

[0038] The side walls of the separation box 2, the feeding box 3 and the coarse coal collection box 11 are provided with observation windows in the vertical direction.

[0039] It should be noted that the observation windows are arranged to facilitate observation of the internal conditions of the separation box 2, the feeding box 3 and the coarse coal collection box 11.

[0040] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In addition, the terms "first", "second", "third", "fourth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated, so that the features with "first", "second", "third", "fourth" can explicitly or implicitly include at least one of the features.

[0042] In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specified, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0043] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A coal dust coarseness separator for thermal power plants, characterized in that, The utility model relates to a coal powder separating device, including support seat (1), the top of support seat (1) is equipped with the installation groove, and the installation groove is fixedly installed with the separating box (2) for separating the coal powder thickness, the separating box (2) is provided with and screen board (4), and the separating box (2) is located the bottom of screen board (4) and is equipped with vibrator (22) on the two inner walls, the separating box (2) is located the above of screen board (4) and is equipped with the poking assembly (6) for reciprocating poking to coal material, the top of support seat (1) is located the both sides of separating box (2) and is equipped with the coarse coal collection box (11), the both sides of separating box (2) are equipped with the discharge gate (12), and the discharge gate (12) is communicated with the inside of coarse coal collection box (11), and the top of coarse coal collection box (11) is equipped with the plugging assembly (10) for controlling the opening and closing of discharge gate (12) on it.

2. A coal dust coarse-fine separator for thermal power plants according to claim 1, characterized in that: The both sides of screen board (4) are all inclined structure, and the height of screen board (4) middle part is higher than the height of screen board (4) both ends, the separating box (2) is installed with the feeding box (3), and the bottom of feeding box (3) is provided with the discharge cylinder (5), the discharge cylinder (5) is located the directly above of screen board (4), the both sides of separating box (2) are integrally provided with the lug, the vibrator (22) is fixedly installed on the top of lug, and the output end of vibrator (22) is connected with screen board (4).

3. The coal dust coarse-fine separator for thermal power plants according to claim 1, characterized in that: The poking assembly (6) includes electric telescopic rod (9), mounting plate (14), screw (15) and poking plate (17), the top of separating box (2) is symmetrically installed with electric telescopic rod (9), and the piston rod end of electric telescopic rod (9) is fixedly connected with mounting plate (14) in separating box (2), the mounting plate (14) is inclinedly arranged, the mounting plate (14) is rotatably connected with screw (15), and the end of mounting plate (14) is fixedly installed with servo motor (13), the output shaft end of servo motor (13) is fixed with screw (15) in mounting plate (14), the outer side of screw (15) is threadedly connected with sliding block (16), and the bottom of sliding block (16) is integrally connected with poking plate (17), and two poking plates (17) are located above the both inclined surfaces of screen board (4) respectively.

4. A coal dust coarse-fine separator for thermal power plants according to claim 3, characterized in that: The mounting plate (14) is symmetrically fixedly connected with limiting rod, the both ends of sliding block (16) are symmetrically provided with limiting hole, and two limiting rods are slidably connected in the both limiting holes of sliding block (16).

5. The coal dust coarseness separator of a thermal power plant according to claim 1, characterized in that: The blocking assembly (10) comprises a blocking plate (21), a top opening slot of the coarse coal collecting box (11), and a sliding connection of the blocking plate (21) in the slot, the blocking plate (21) is blocked on the surface of the discharge port (12), the top of the coarse coal collecting box (11) is fixedly connected with an L-shaped plate (18), the L-shaped plate (18) is rotatably connected with a lifting lead screw (19), the top of the L-shaped plate (18) is provided with a driving motor (20), and the output shaft end of the driving motor (20) is fixed with the lifting lead screw (19), one end of the blocking plate (21) located outside the coarse coal collecting box (11) is integrally provided with a lifting block, and the lifting block is threadedly connected outside the lifting lead screw (19).

6. A coal dust coarse-fine separator for thermal power plants according to claim 1, characterized in that: The cross section of the bottom end of the separation box (2) is an inverted isosceles trapezoidal structure, and the bottom of the separation box (2) is provided with a discharge cylinder (7), and the outer side of the discharge cylinder (7) is provided with a control valve (8) for controlling the opening and closing of the discharge cylinder (7).

7. The coal dust coarseness separator of a thermal power plant according to claim 1, characterized in that: The bottom corners of the support seat (1) are provided with support legs (23), and the bottom of the support leg (23) is provided with a support foot.

8. The coal dust coarseness separator of a thermal power plant according to claim 1, characterized in that: The side walls of the separation box (2), the feeding box (3) and the coarse coal collecting box (11) are provided with vertical observation windows.

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