Self-cleaning type wood chip separator

Abstract

The utility model discloses a self-cleaning type wood dust separator which comprises a separator body, a motor driving module and a screen, and further comprises a rotating speed sensing module and an air blowing module, the separator body is provided with a feeding pipe and a discharging pipe, and the motor driving module drives the screen to separate pulverized coal and impurities and outputs the pulverized coal meeting the requirements through the discharging pipe; a rotating speed monitoring sensor arranged on the rotating speed sensing module senses the rotating speed change of the screen in real time and feeds back stacking and false blocking information in time, the air blowing module receives the rotating speed information output by the rotating speed sensing module and outputs compressed air to the surface of the screen to clean pulverized coal or scraps blocking screen holes, the accident response time is shortened, the automation degree is high, and the efficiency is high. Excessive manual intervention is avoided, the service life of the equipment is prolonged, and the phenomena of material stacking and false blocking occurring when the blanking amount fluctuates or the screen is blocked are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace pulverized coal injection filtering, and more particularly to a self-cleaning sawdust separator. Background Art

[0002] Currently, 85%-90% of the world's pig iron is produced in blast furnaces that use supplemental fuel injection. Given my country's abundant coal reserves, pulverized coal injection (PFI) has become the preferred choice for the vast majority of blast furnaces in my country. During the pulverized coal production process, fibrous impurities such as sawdust that cannot be crushed by the mill can easily clog the blast furnace system during pneumatic fluidization, hindering smooth operation.

[0003] Currently, installing a sawdust separator during the collection, storage, and injection processes of pulverized coal is an effective means of improving the stability of pulverized coal conveying. However, during the collection and injection process, the high-speed movement of the pulverized coal accelerates the wear of the filter screen, and filter replacement is very difficult. Therefore, installing a sawdust separator in the low-speed pipeline between the pulverized coal bin and the upper and lower structures of the injection tank is the current main method for pulverized coal screening. Depending on the source of power, sawdust separators can be divided into gravity sawdust separators, pneumatic sawdust separators, and electric sawdust separators. Electric sawdust separators are widely used due to their high degree of automation and stability. However, when the discharge rate fluctuates or the screen becomes clogged, electric sawdust separators are prone to material accumulation and false blockage, increasing the number of production stoppages for maintenance and seriously affecting the service life of the motor. Therefore, to address these defects and shortcomings, it is necessary to design a new sawdust separator.

[0004] The national utility model patent (publication number: CN201669167U) discloses an electric wood chip separator, including a separation device, and a mechanical drive device is connected to the rotating shaft of the separation device. Wherein, the mechanical drive device includes a motor, a reducer is connected to the output shaft of the motor, and the output shaft of the reducer is connected to the rotating shaft of the separation device through a sprocket transmission device; the sprocket transmission device includes a driving wheel fixed on the output shaft of the reducer and a driven wheel fixed on the rotating shaft of the separation device, and the driving wheel is connected to the driven wheel through a chain. The utility model adopts motor forced drive technology to ensure that the separation device of the wood chip separator rotates at a fixed speed, ensures the uniform rotation of the separation device, reduces the situation where the separation device is not flexible in self-rotation, and achieves the purpose of separating light debris from coal powder. However, this technical solution does not overcome the production suspension and maintenance accidents caused by stacking and false blockage, which undoubtedly shortens the service life of the equipment and increases labor costs. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a self-cleaning wood chip separator with the characteristics of high degree of automation, strong adaptability and simple structure. It can effectively identify and prevent pile-up and false blockage problems, and avoid motor stall accidents.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0007] A self-cleaning wood chip separator includes a separator body, a motor drive module, a screen, a speed sensing module and an air purge module. The separator body is provided with a feed pipe and a discharge pipe. The motor drive module drives the screen, and the screen separates coal powder and impurities and outputs coal powder that meets the requirements through the discharge pipe; the air purge module receives the speed information output by the speed sensing module and outputs compressed gas to the surface of the screen.

[0008] As a further improvement of the present invention, the speed sensing module includes a speed monitoring sensor and a monitoring baffle, the monitoring baffle is connected to the pulley, and the pulley is connected to the screen through a power shaft.

[0009] Preferably, the air purge module includes an upper purge line and a lower purge line, the upper purge line includes an upper air inlet pipe, an upper purge ring pipe and an upper purge nozzle, the lower purge line includes a lower air inlet pipe, a lower purge ring pipe and a lower purge nozzle, and the upper purge line and the lower purge line are connected to the shell.

[0010] Preferably, the upper purge nozzle and the lower purge nozzle are arranged toward one side of the screen, the upper purge nozzle outputs compressed gas on the upper surface of the screen, and the lower purge nozzle outputs compressed gas on the lower surface of the screen.

[0011] Preferably, the lower purge nozzle is provided with a pulse valve group.

[0012] Beneficial effects of the utility model:

[0013] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0014] 1. The self-cleaning sawdust separator of the utility model connects the monitoring baffle with the pulley, and the pulley is connected to the screen through the power shaft. Therefore, the speed monitoring sensor can sense the speed change of the screen in real time and provide timely feedback on the pile and false blockage information.

[0015] 2. Upon receiving information about material accumulation and false blockage, the air purge module of this utility model quickly responds by outputting compressed air to the upper and lower surfaces of the screen, clearing away coal dust or debris blocking the screen holes and restoring normal operation. The air purge module has a simple structure and a high degree of automation, avoiding excessive manual intervention.

[0016] 3. Since the number and duration of drive motor overload are reduced, the reliability of the equipment is improved, the service life is extended, and the number of shutdowns and maintenance is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic structural diagram of the air purge module of the utility model;

[0019] Figure 3 This is a structural diagram of the rotation sensing module of the present invention;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model;

[0021] In the figure: 1. separator body; 11. feed pipe; 12. discharge pipe; 13. shell; 2. motor drive module; 21. pulley; 22. power shaft; 3. speed sensing module; 31. speed monitoring sensor; 32. monitoring baffle; 4. air purge module; 41. upper purge pipeline; 411. upper air inlet pipe; 412. upper purge ring pipe; 413 upper purge nozzle; 42. lower purge pipeline; 421. lower air inlet pipe; 422. lower purge ring pipe; 423 lower purge nozzle; 5. screen. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "provided with" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0024] Refer to the attached Figures 1 to 4 As shown, the present invention provides an embodiment of a self-cleaning wood chip separator, comprising a separator body 1, a motor drive module 2, and a screen 5, as well as a speed sensing module 3 and an air purge module 4. The separator body 1 is provided with a feed pipe 11 and a discharge pipe 12. Pulverized coal enters the separator body 1 through the feed pipe 11, and the screen 5 driven by the motor drive module 2 rotates to separate the pulverized coal and impurities, and the pulverized coal that meets the requirements is discharged through the discharge pipe 12.

[0025] Specifically, in this embodiment, the speed sensing module 3 is equipped with a speed monitoring sensor 31 and a monitoring baffle 32. The monitoring baffle 32 is connected to the pulley 21, and the pulley 21 is connected to the screen 5 via the power shaft 22. When the material discharge fluctuates or the screen 5 becomes blocked, the decrease in the speed of the screen 5 is reflected in real time as a decrease in the frequency of the monitoring baffle 32 passing through the speed monitoring sensor 31. The speed monitoring sensor 31 promptly feeds back information on material pileup and false blockage to the control center.

[0026] In addition, the air purge module 4 includes an upper purge line 41 and a lower purge line 42. The upper purge line 41 includes an upper air inlet pipe 411, an upper purge ring pipe 412, and an upper purge nozzle 413. The lower purge line 42 includes a lower air inlet pipe 421, a lower purge ring pipe 422, and a lower purge nozzle 423. The upper purge line 41 and the lower purge line 42 are connected to the housing 13. When the air purge module 4 receives the pile and false blockage information provided by the control center, the compressed gas input through the upper air inlet pipe 411 and the lower air inlet pipe 421 is distributed through the upper purge ring pipe 412 and the lower purge ring pipe 422, and then sprayed onto the upper and lower surfaces of the screen 5 through the upper purge nozzle 413 and the lower purge nozzle 423, respectively, to clean the coal powder or debris blocking the screen holes. The purge is stopped after the screen speed returns to normal. The system has a simple structure, reduces excessive manual intervention, improves the system's automation level, and reduces maintenance time and frequency.

[0027] In a preferred embodiment, the lower purge nozzle 423 is provided with a pulse valve group. When the upper purge nozzle 413 is purging, the lower purge nozzle 423 is opened in sequence, and the pressurization effect of the pulse valve is utilized to increase the probability of coal powder or debris being blown up.

[0028] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A self-cleaning wood chip separator, comprising a separator body (1), a motor drive module (2) and a screen (5), characterized in that: The separator body (1) is provided with a feed pipe (11) and a discharge pipe (12); the motor drive module (2) drives the screen (5); the screen (5) separates the coal powder from the impurities and outputs the coal powder that meets the requirements through the discharge pipe (12); and the air purge module (4) receives the rotation speed information output by the rotation speed sensing module (3) and outputs compressed gas to the surface of the screen (5).

2. The self-cleaning sawdust separator according to claim 1, characterized in that: The speed sensing module (3) comprises a speed monitoring sensor (31) and a monitoring baffle (32), wherein the monitoring baffle (32) is connected to a pulley (21), and the pulley (21) is connected to the screen (5) via a power shaft (22).

3. The self-cleaning wood chip separator according to claim 1, characterized in that: The air purge module (4) comprises an upper purge line (41) and a lower purge line (42); the upper purge line (41) comprises an upper air inlet pipe (411), an upper purge ring pipe (412) and an upper purge nozzle (413); the lower purge line (42) comprises a lower air inlet pipe (421), a lower purge ring pipe (422) and a lower purge nozzle (423); the upper purge line (41) and the lower purge line (42) are connected to the housing (13).

4. The self-cleaning wood chip separator according to claim 3, characterized in that: The upper purge nozzle (413) and the lower purge nozzle (423) are arranged toward one side of the screen (5); the upper purge nozzle (413) outputs compressed gas to the upper surface of the screen (5); and the lower purge nozzle (423) outputs compressed gas to the lower surface of the screen (5).

5. A self-cleaning wood chip separator according to claim 3 or 4, characterized in that: The lower purge nozzle (423) is provided with a pulse valve group.

Images