A kind of pulverizing device for coal deep processing

Abstract

The utility model relates to coal processing equipment technical field, concretely relates to a kind of for coal deep processing with crushing device, including crushing box, the top of crushing box is equipped with feed inlet, bottom side is equipped with discharge gate, primary crushing mechanism, secondary crushing mechanism and vibrating screen mesh board are sequentially arranged in crushing box from top to bottom;The primary crushing mechanism includes a pair of horizontally arranged roll, and the surface of roll is equipped with staggered distribution's broken tooth;The secondary crushing mechanism includes vertically arranged cylindrical inner tooth plate and coaxially arranged hammer head group, and the top of cylindrical inner tooth plate is equipped with the baffle connected with the inner wall of crushing box;The vibrating screen mesh board is obliquely arranged, and higher one end is connected with the side wall of crushing box by elastic support, lower one end is rotatably connected with one side of crushing box, and the side of lower one end of crushing box is equipped with return channel, and the return channel is connected to the baffle above secondary crushing mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of coal processing equipment, specifically to a crushing device for deep coal processing. Background Technology

[0002] Deep coal processing refers to the core technologies that use physical, chemical, or biological methods to process raw coal in order to improve coal utilization efficiency and reduce pollutant emissions. These technologies are widely used in power generation, metallurgy, and chemical industries. Crushing equipment, as a key pretreatment device in deep coal processing, is responsible for breaking large pieces of raw coal into target particle sizes (typically 2-50 mm) to meet the requirements of subsequent processes for fuel adaptability, reactivity, and other properties.

[0003] In existing technologies, coal crushing devices mostly adopt single-stage roller press or hammer crusher structures, which have the following prominent problems: First, a single crushing mechanism is difficult to achieve synergistic optimization of coarse and fine crushing, resulting in low crushing efficiency and uneven particle size distribution; second, there is a lack of an effective screening-return recycling mechanism, making it impossible to automatically recover and re-crush substandard particles, affecting the stability of finished product quality. Therefore, there is an urgent need to develop a coal crushing device with optimized structure, precise grading, and durability. Utility Model Content

[0004] The purpose of this invention is to provide a crushing device for deep coal processing. Through the synergistic action of multi-stage crushing mechanisms, dynamic screening, and circulating return material design, it solves the problems of low crushing efficiency, uneven particle size, and inability to re-crush in the prior art.

[0005] The present invention provides a crushing device for deep coal processing, comprising a crushing chamber with a feed inlet at the top and a discharge outlet on one side of the bottom. The crushing chamber contains, from top to bottom, a primary crushing mechanism, a secondary crushing mechanism, and a vibrating screen. The primary crushing mechanism includes a pair of horizontally arranged rollers with staggered crushing teeth on their surfaces. The secondary crushing mechanism includes a vertically arranged cylindrical inner toothed plate and a coaxially arranged hammer assembly. The top of the cylindrical inner toothed plate is provided with a guide plate connected to the inner wall of the crushing chamber. The vibrating screen is inclined, with its higher end connected to the side wall of the crushing chamber via an elastic support, and its lower end rotatably connected to one side of the crushing chamber. A return channel is provided on the side of the crushing chamber at the lower end, and this return channel connects to the top of the guide plate of the secondary crushing mechanism.

[0006] As a preferred technical solution of this utility model, the middle of the primary crushing mechanism corresponds to the feed inlet, and both the feed inlet and the upper surface of the guide plate are provided with detachable wear-resistant liners.

[0007] As a preferred technical solution of this utility model, the crushing teeth on the crushing roller are made of tungsten carbide alloy, with a tooth height of 30~50mm and a spacing between adjacent teeth of 1.2~1.5 times the tooth height.

[0008] As a preferred technical solution of this utility model, the outer side of the cylindrical inner toothed plate is provided with a fixing frame that is connected to the inner wall of the crushing chamber.

[0009] As a preferred embodiment of this utility model, the hammerhead assembly includes a main shaft and a plurality of hammerheads arranged in a spiral pattern. The surface of each hammerhead is inlaid with a hard alloy strip, and its cross-section is trapezoidal with the larger end facing the direction of rotation.

[0010] As a preferred technical solution of this utility model, the top and bottom of the hammer head assembly are provided with support frames for fixing the main shaft position, and a conical guide and protection plate is provided above the support frame.

[0011] As a preferred embodiment of this utility model, the aperture of the vibrating screen plate is 5~8mm, and the bottom of the vibrating screen plate is directly connected to the discharge port.

[0012] As a preferred embodiment of this utility model, the return material channel is equipped with a spiral elevator.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1. Multi-stage synergistic crushing: The primary crushing roller and the secondary hammer assembly form a "coarse crushing-fine crushing" gradient crushing structure. Combined with the material guiding effect of the guide plate, the crushing efficiency is significantly improved, increasing the capacity by 30% to 50% compared to a single-stage crushing device;

[0015] 2. Precise particle size classification: The vibrating screen, return channel, and spiral lifting mechanism form a closed-loop circulation system. Particles that do not meet the standard (>8mm) are returned to the secondary crushing area for reprocessing through the return channel to ensure that the output particle size is uniform and stable (≤8mm accounts for ≥95%).

[0016] 3. High wear resistance design: The removable wear-resistant liners of the feed inlet and guide plate, and the tungsten carbide alloy crushing teeth (hardness HRC65~70) effectively reduce material wear and extend the equipment maintenance cycle to more than 6 months;

[0017] 4. Compact and reliable structure: The design of the elastic support and rotating screen plate realizes the automatic unblocking function. The screw conveyor and the conical guide guard plate work together to avoid material blockage and ensure high operational stability. Attached Figure Description

[0018] Figure 1 This is an external structural diagram of a coal crushing device for deep coal processing according to the present invention.

[0019] Figure 2 This is a cross-sectional three-dimensional structural diagram of a crushing device for deep coal processing according to the present invention.

[0020] Figure 3 This is a longitudinal cross-sectional three-dimensional structural diagram of a crushing device for deep coal processing according to the present invention.

[0021] Figure 4 This is an exploded structural diagram of the secondary crushing mechanism of a crushing device for deep coal processing according to the present invention.

[0022] As shown in the figure:

[0023] 1. Crushing box; 2. Feed inlet; 3. Discharge outlet; 4. Primary crushing mechanism; 5. Secondary crushing mechanism; 6. Vibrating screen plate; 7. Crushing roller; 8. Crushing teeth; 9. Cylindrical internal toothed plate; 10. Hammer assembly; 11. Guide plate; 12. Elastic support; 13. Return channel; 14. Fixing frame; 15. Main shaft; 16. Hammer; 17. Hard alloy strip; 18. Support frame; 19. Guide and protective plate; 20. Screw elevator. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be 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 be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1:

[0027] As per the instruction manual Figure 1-3 As shown, a crushing device for deep coal processing includes a crushing box 1. The top of the crushing box 1 is provided with a feed inlet 2 and the bottom side is provided with a discharge outlet 3. The crushing box 1 is provided with a primary crushing mechanism 4, a secondary crushing mechanism 5 and a vibrating screen plate 6 arranged sequentially from top to bottom. The middle of the primary crushing mechanism 4 corresponds to the feed inlet 2.

[0028] In this utility model, the primary crushing mechanism 4 includes a pair of horizontally arranged crushing rollers 7. The surface of the crushing rollers 7 is provided with staggered crushing teeth 8. The crushing teeth 8 on the crushing rollers 7 are made of tungsten steel alloy, with a tooth height of 30~50mm and a spacing between adjacent teeth of 1.2~1.5 times the tooth height. At the same time, the crushing rollers 7 rotate in opposite directions and rotate inwards simultaneously. The crushing rollers 7 are driven by an external electric motor.

[0029] In this utility model, the secondary crushing mechanism 5 includes a vertically arranged cylindrical inner toothed plate 9 and a coaxially arranged hammer head assembly 10. The top of the cylindrical inner toothed plate 9 is provided with a guide plate 11 connected to the inner wall of the crushing box 1, and the outer side of the cylindrical inner toothed plate 9 is provided with a fixing frame 14 connected to the inner wall of the crushing box 1.

[0030] In this utility model, the vibrating screen plate 6 is inclined, and the higher end is connected to the side wall of the crushing box 1 through the elastic support member 12. The elastic support member 12 is a spring rod or an additional vibration motor to enable the vibrating screen to vibrate at high frequency. The lower end is rotatably connected to one side of the crushing box 1, and the crushing box 1 is provided with a return channel 13 on the side of the lower end. The return channel 13 is connected to the guide plate 11 above the secondary crushing mechanism 5. The interior of the return channel 13 is provided with a spiral elevator 20 feed inlet 2 and the upper surface of the guide plate 11 is provided with a detachable wear-resistant liner.

[0031] In this utility model, the aperture of the vibrating screen plate 6 is 5~8mm, the bottom of the vibrating screen plate 6 is directly connected to the discharge port 3, and the discharge port 3 is provided with an inclined guide slope.

[0032] As per the instruction manual Figure 4 As shown, the hammer assembly 10 includes a main shaft 15 and multiple hammers 16 arranged in a spiral shape. The surface of the hammer 16 is inlaid with a hard alloy strip 17, which has a trapezoidal cross-section with the larger end facing the direction of rotation. The top and bottom of the hammer assembly 10 are provided with support frames 18 to fix the position of the main shaft 15, and a conical guide and protective plate 19 is provided above the support frame 18. The main shaft 15 and the support frame 18 are rotatably connected by bearings, and the bottom of the main shaft 15 is connected to an external motor for drive through a gear plate and chain.

[0033] Working principle

[0034] 1. Multi-stage crushing stage: The raw coal first enters the primary crushing mechanism 4. Through the squeezing action of a pair of horizontal rollers 7 (crushing teeth 8 cut in an alternating manner, and both rollers 7 rotate towards the center), the large pieces of raw coal are initially crushed into intermediate products with a particle size of 10~50mm. The intermediate products then fall into the secondary crushing mechanism 5. Under the guidance of the guide plate 11, they enter the working area of ​​the cylindrical inner tooth plate 9 and the hammer group 10. The high-speed rotating hammers 16 (with hard alloy strips 17 on the surface to enhance impact toughness) and the inner tooth plate (fixed support to enhance rigidity) work together to further crush the material into fine particles with a particle size of ≤8mm through shearing and collision.

[0035] 2. Dynamic screening stage: The crushed material falls onto the inclined vibrating screen plate 6. The screen plate vibrates with a small amplitude under the drive of the elastic support 12 (spring rod or auxiliary connection vibrating motor), which promotes the loosening of the material and accelerates the screening. Qualified particles with a particle size ≤8mm directly pass through the screen plate and fall into the bottom discharge port 3, completing the preliminary classification.

[0036] 3. Recycled material return stage: Unqualified particles with a diameter >8mm that have not passed through the screen roll along the screen plate to the lower end and enter the built-in screw conveyor 20 through the return channel 13; the screw conveyor 20 lifts the material to the top of the guide plate 11 (corresponding to the top of the secondary crushing mechanism 5) and puts it back into the crushing process until the particle size meets the standard.

[0037] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A crushing device for deep coal processing, comprising a crushing chamber (1), wherein the top of the crushing chamber (1) is provided with a feed inlet (2) and the bottom side is provided with a discharge outlet (3), characterized in that: The crushing chamber (1) is provided with a primary crushing mechanism (4), a secondary crushing mechanism (5) and a vibrating screen plate (6) arranged from top to bottom. The primary crushing mechanism (4) includes a pair of horizontally arranged crushing rollers (7), and the surface of the crushing rollers (7) is provided with staggered crushing teeth (8). The secondary crushing mechanism (5) includes a vertically arranged cylindrical inner toothed plate (9) and a coaxially arranged hammer head assembly (10). The top of the cylindrical inner toothed plate (9) is provided with a guide plate (11) connected to the inner wall of the crushing box (1). The vibrating screen plate (6) is inclined, and the higher end is connected to the side wall of the crushing box (1) through the elastic support (12), and the lower end is rotatably connected to one side of the crushing box (1). The crushing box (1) is provided with a return channel (13) on the side of the lower end, and the return channel (13) is connected to the guide plate (11) of the secondary crushing mechanism (5).

2. The crushing device for deep coal processing according to claim 1, characterized in that: The middle of the primary crushing mechanism (4) corresponds to the feed inlet (2), and the feed inlet (2) and the upper surface of the guide plate (11) are both provided with detachable wear-resistant liners.

3. A crushing device for deep coal processing according to claim 1, characterized in that: The crushing teeth (8) on the crushing roller (7) are made of tungsten steel alloy, with a tooth height of 30~50mm and a spacing between adjacent teeth of 1.2~1.5 times the tooth height.

4. A crushing device for deep coal processing according to claim 1, characterized in that: The outer side of the cylindrical inner toothed plate (9) is provided with a fixing frame (14) that is connected to the inner wall of the crushing box (1).

5. A crushing device for deep coal processing according to claim 1, characterized in that: The hammerhead assembly (10) includes a main shaft (15) and a plurality of hammerheads (16) arranged in a spiral shape. The surface of the hammerheads (16) is inlaid with hard alloy strips (17), which have a trapezoidal cross section with the larger end facing the direction of rotation.

6. A crushing device for deep coal processing according to claim 5, characterized in that: The top and bottom of the hammer (16) group (10) are provided with support frames (18) to fix the position of the main shaft (15), and a conical flow guide plate (19) is provided above the support frame (18).

7. A crushing device for deep coal processing according to claim 1, characterized in that: The aperture of the vibrating screen plate (6) is 5~8mm, and the bottom of the vibrating screen plate (6) is directly connected to the discharge port (3).

8. A crushing device for deep coal processing according to claim 1, characterized in that: The return channel (13) is equipped with a spiral elevator (20).

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