Jaw type counter-rotating screening crusher

Abstract

The invention relates to the technical field of crushers, in particular to a jaw type counter-rotating screening crusher which comprises a screening device, a crusher and a transition bin, the lower end of the screening device is installed at the upper end of the crusher, the upper end of the transition bin is installed at the lower end of the crusher, and the screening device, the crusher and the transition bin are each provided with an upper opening and a lower opening; the screening device, the crushing device and the transition bin are communicated with one another, a counter-rotating crushing assembly is installed in the crushing device and comprises a driving roller and a driven roller, the driving roller and the driven roller are both rotationally connected with the crushing device, a gear motor is installed on the surface of the crushing device, and the gear motor is used for driving the driving roller to rotate; and the driving roller drives the driven roller pair to rotate through gear transmission. The coal economizer ash bucket and ash conveying pipeline coking block cleaning device aims at solving the problem that coal economizer ash buckets and ash conveying pipeline coking blocks are inconvenient to clean manually.

Description

Technical Field

[0001] The invention relates to the technical field of crushers, in particular to a jaw counter-rotating screening crusher. Background Art

[0002] Existing thermal power generation enterprises generally have coking problems inside the economizer due to the variety of coal types burned and changes in operating conditions. The soot is blown into the ash hopper after the boiler is blown, blocking the ash silo pump filter and ash conveying pipeline, resulting in the problem of normal ash conveying. The main problem at present is the blockage of the silo pump inlet filter and the ash conveying pipeline, which makes it impossible to convey the ash normally.

[0003] The coke blocks are blocked at the filter screen at the inlet of the silo pump, which prevents the upper ash from entering the silo pump and being transported away in time. The ash accumulates in the ash hopper at the bottom of the economizer and cannot be transported. After long-term operation, more and more ash and coke will accumulate, seriously affecting the safe operation of the equipment. Currently, only manual ash transport can be used. For the blocked filter screen at the inlet of the silo pump, the filter manhole door is removed and the ash is discharged manually. After the ash is discharged to the ash hopper below, it is discharged to the ground through a temporary ash pipe and finally cleaned manually.

[0004] This treatment method not only results in a large workload of manual ash conveying and a poor working environment, but also causes a certain amount of dust when the ash is manually conveyed to the ground. The dust floats into the surrounding air and is sucked into the surrounding primary fans, causing fan wear and dust to enter the oil through the breathing holes of the oil station, bringing certain equipment safety risks. Summary of the invention

[0005] The object of the present invention is to provide a jaw counter-rotating screening crusher to solve the problem of inconvenience in manually cleaning the coke blocks in the economizer ash hopper and ash conveying pipeline.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The jaw counter-rotating screening crusher comprises a screener, a crusher and a transition bin. The lower end of the screener is mounted on the upper end of the crusher, and the upper end of the transition bin is mounted on the lower end of the crusher. The screener, the crusher and the transition bin all have upper and lower openings, and the screener, the crusher and the transition bin are interconnected. A counter-rotating crushing assembly is installed in the crusher.

[0008] Preferably, the counter-rotating crushing assembly includes an active roller and a driven roller, both of which are rotationally connected to the crusher. A reduction motor is installed on the surface of the crusher, and the reduction motor is used to drive the active roller to rotate. The active roller drives the driven roller to rotate counter-rotatingly through gear transmission.

[0009] Preferably, a filter screen is installed on the inner wall of the screener, and the filter screen is used to screen the raw ash.

[0010] Preferably, the filter screen is arranged obliquely and directly faces the lower part of the upper opening of the sifter, and there is a gap between the lowest point of the filter screen and the side wall of the sifter.

[0011] Preferably, a diverter plate is fixedly connected to the inner wall of the screen, one end of the diverter plate is fixedly connected to the end of the filter screen at the lowest point, and the other end divides the lower opening of the screen into left and right parts.

[0012] Preferably, the inner wall of the screener is fixedly connected with a first guide plate which is inclined, the inner wall of the screener is fixedly connected with a second guide plate which is inclined, and the inner wall of the screener is fixedly connected with a third guide plate which is inclined, there is a gap between the highest point of the first guide plate and the side wall of the screener, and the gap between the highest point of the first guide plate and the side wall of the screener is smaller than the gap between the lowest point of the filter net and the side wall of the screener, there is a gap between the highest point of the second guide plate and the side wall of the screener, and the gap between the highest point of the second guide plate and the side wall of the screener is smaller than the gap between the highest point of the first guide plate and the side wall of the screener, the highest point of the third guide plate is connected to the side wall of the screener, the length of the first guide plate is greater than the length of the second guide plate, and the length of the second guide plate is greater than the length of the third guide plate.

[0013] Preferably, a partition plate is fixedly connected to the inner wall of the crusher, and the partition plate divides the inner space of the crusher into a crushing chamber and a transition chamber. The counter-rotating crushing assembly is located in the crushing chamber. The upper opening of the crusher includes a coke block inlet and a raw ash inlet. The raw ash inlet is connected to the transition chamber, and the coke block inlet is connected to the crushing chamber. The left part of the lower opening of the screener is aligned with the raw ash inlet, and the right part of the lower opening of the screener is aligned with the coke block inlet.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The designed jaw counter-rotating screening crusher realizes the integration of screening and crushing functions, can efficiently process the hard coke blocks in the economizer ash hopper, significantly reduces the system blockage frequency, and improves the stability and efficiency of the ash conveying system operation. In addition, since mechanized screening and crushing effectively replace manual clearing operations, it reduces the dependence on high-intensity manual participation and enhances the stability and economy of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a front cross-sectional view of the screener of the present invention;

[0018] Figure 3 It is a top sectional view of the crusher of the present invention;

[0019] Figure 4 It is a top view of the crusher of the present invention.

[0020] In the figure: 1. screener; 2. filter screen; 3. diverter plate; 4. first guide plate; 5. second guide plate; 6. third guide plate; 7. baffle; 8. inspection window; 9. crusher; 10. partition plate; 11. active roller; 12. reduction motor; 13. transition bin; 14. driven roller; 15. coke block inlet; 16. raw ash inlet. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 4 , the present invention provides a technical solution.

[0023] The jaw counter-rotating screening crusher comprises a screener 1, a crusher 9 and a transition bin 13. The lower end of the screener 1 is mounted on the upper end of the crusher 9, and the upper end of the transition bin 13 is mounted on the lower end of the crusher 9. The screener 1, the crusher 9 and the transition bin 13 all have two upper and lower openings, and the screener 1, the crusher 9 and the transition bin 13 are interconnected. A counter-rotating crushing assembly is installed in the crusher 9. Coking inside the economizer passes through the screener 1 and then to the crusher 9 after soot blowing in the boiler, and is crushed by the counter-rotating crushing assembly in the crusher 9, so as to avoid large pieces of coking from clogging the filter screen and the ash conveying pipeline of the ash conveying bin pump. At the same time, the step of manually cleaning the coking caused by the blockage is omitted, and it is easy to use.

[0024] The counter-rotating crushing assembly includes an active roller 11 and a driven roller 14, both of which are rotationally connected to the crusher 9. By controlling the distance between the active roller 11 and the driven roller 14, the size of the coke blocks after crushing can be controlled. A reduction motor 12 is installed on the surface of the crusher 9. The reduction motor 12 is used to drive the active roller 11 to rotate. The active roller 11 drives the driven roller 14 to rotate in a counter-rotating manner through gear transmission. The reduction motor 12 includes a reducer and a motor. Counter-rotating movement refers to the two components rotating in opposite directions, that is, the active roller 11 and the driven roller 14 rotate in opposite directions. When the coke blocks enter the counter-rotating crushing assembly, they are crushed by the extrusion force and shear force.

[0025] A filter screen 2 is installed on the inner wall of the screener 1. The pore size of the filter screen 2 is φ10 mm and is used to screen the raw ash. By setting the filter screen 2, it can efficiently separate the raw ash with smaller particle size and allow it to directly enter the transition bin 13, while intercepting large-sized coke blocks from entering the crusher 9.

[0026] The filter screen 2 is inclined and faces the lower part of the upper opening of the sifter 1, ensuring that the material falling from the upper opening of the sifter 1 can fall onto the filter screen 2. There is a gap between the lowest point of the filter screen 2 and the side wall of the sifter 1, so that the intercepted coke blocks fall down from this gap. Specifically, the material enters the sifter 1 from the upper opening of the sifter 1 and falls onto the filter screen 2. The raw ash with smaller particle size directly passes through the filter screen 2, and the large-sized coke blocks roll along the surface of the filter screen 2 and fall from the gap between the lowest point of the filter screen 2 and the side wall of the sifter 1, so that the raw ash and the coke blocks are separated and can both fall.

[0027] A diverter plate 3 is fixedly connected to the inner wall of the screener 1, one end of the diverter plate 3 is fixedly connected to the end of the filter screen 2 at the lowest point, and the other end divides the lower opening of the screener 1 into two left and right parts. By setting the diverter plate 3, the separated raw ash and coke blocks are separated when they fall.

[0028] The inner wall of the sifter 1 is fixedly connected with a first guide plate 4 which is set obliquely, the inner wall of the sifter 1 is fixedly connected with a second guide plate 5 which is set obliquely, and the inner wall of the sifter 1 is fixedly connected with a third guide plate 6 which is set obliquely, there is a gap between the highest point of the first guide plate 4 and the side wall of the sifter 1, and the gap between the highest point of the first guide plate 4 and the side wall of the sifter 1 is smaller than the gap between the lowest point of the filter screen 2 and the side wall of the sifter 1, there is a gap between the highest point of the second guide plate 5 and the side wall of the sifter 1, and the gap between the highest point of the second guide plate 5 and the side wall of the sifter 1 is smaller than the gap between the highest point of the first guide plate 4 and the side wall of the sifter 1, and the highest point of the third guide plate 6 and the side wall of the sifter 1 are spaced apart from each other. The walls are connected, the length of the first guide plate 4 is greater than the length of the second guide plate 5, and the length of the second guide plate 5 is greater than the length of the third guide plate 6. By setting the first guide plate 4, the second guide plate 5, and the third guide plate 6, large-sized coke blocks will fall from the gap between the lowest point of the filter screen 2 and the side wall of the screener 1 and will fall onto the first guide plate 4, the second guide plate 5, or the third guide plate 6. The first guide plate 4, the second guide plate 5, and the third guide plate 6 will guide the coke blocks that fall thereon to fall from different horizontal positions due to their different lengths, which is beneficial to prevent the coke blocks from falling from one point and the actual working surface of the counter-rotating crushing assembly from being not fully utilized.

[0029] The inner wall of the screener 1 is fixedly connected with a baffle 7, which is used to prevent the falling coke blocks from running out of the position above the counter-rotating crushing assembly.

[0030] A partition plate 10 is fixedly connected to the inner wall of the crusher 9, and the partition plate 10 divides the space inside the crusher 9 into a crushing chamber and a transition chamber. The counter-rotating crushing assembly is located in the crushing chamber. The upper opening of the crusher 9 includes a coke block inlet 15 and a raw ash inlet 16. The raw ash inlet 16 is connected to the transition chamber, and the coke block inlet 15 is connected to the crushing chamber. The left part of the lower opening of the screener 1 is aligned with the raw ash inlet 16, and the right part of the lower opening of the screener 1 is aligned with the coke block inlet 15. Through such an arrangement, the raw ash from the left part of the lower opening of the screener 1 falls into the transition chamber in the crusher 9 and then directly falls into the transition bin 13. The coke blocks from the right part of the lower opening of the screener 1 fall into the crushing chamber in the crusher 9 and then fall into the transition bin 13 after being crushed, so as to prevent the raw ash from falling into the counter-rotating crushing assembly and sticking to it.

[0031] The surface of the screener 1 is provided with an inspection window 8 for inspection.

[0032] Through the shearing action of the counter-rotating crushing components, the intercepted coke blocks are crushed to a particle size of ≤5mm to ensure that they meet the traffic requirements of the ash conveying system. The crushed particles are introduced into the ash conveying bin pump through the lower transition bin 13, completing an efficient operation process from screening to crushing and then to transportation. Compared with traditional equipment, the jaw counter-rotating screening crusher realizes the integration of screening and crushing functions, and has the characteristics of modular structure, small footprint, and easy installation. At the same time, by optimizing the tooth shape and crushing parameters, it can efficiently process the hard coke blocks in the economizer ash hopper. Its integrated design not only reduces the space occupied by the equipment, but also significantly reduces the system blockage frequency and improves the stability and efficiency of the ash conveying system. Especially in dealing with complex ash problems, the jaw counter-rotating screening crusher demonstrates leading technical advantages and provides strong technical support for the optimization of the ash conveying system of thermal power plants. In addition, the application of the jaw counter-rotating screening crusher significantly reduces the operating cost and energy consumption of the ash conveying system of thermal power plants, In terms of energy consumption, the integrated design of screening, crushing and conveying of the crusher has significantly improved the operating efficiency of the ash conveying system, reduced the total energy consumption of the system by 8.3%, and reduced the unit ash conveying energy consumption by 16.7%. Although the crusher itself has increased the power consumption to a certain extent, its optimized particle size treatment effect has effectively reduced the frequency of pipeline blockage and the burden of manual cleaning, further reducing the overall energy consumption of the system. At the same time, the optimized ash conveying flow rate has increased by 39%, further enhancing the stability and economy of the system operation. After the transformation, the ash conveying system has been significantly improved in terms of economy, stability and energy saving level, which not only meets the current requirements of high efficiency and environmental protection, but also provides strong support for the development of green energy in thermal power plants, which is in line with the direction of sustainable development.

[0033] The application of jaw counter-rotating screening crusher has significantly improved the safety and environmental protection of the ash conveying system, providing important support for the safe operation and green development of thermal power plants. Through mechanized screening and crushing operations, unplanned shutdown of units due to blockages can be avoided, which is of great significance to ensuring stable power supply. The closed design of the equipment effectively reduces dust emissions, significantly improves the environmental quality of the plant area and the surrounding air conditions, and reflects a positive contribution to environmental protection. In addition, mechanized processing has greatly reduced high-risk manual operations and reduced the frequency of workers' exposure to harsh environments, reflecting a high level of concern for the health and safety of employees, and providing strong technical support for the clean and efficient production of thermal power plants.

[0034] The specific scheme is as follows: when the jaw counter-rotating screening crusher is working, the material enters from the opening on the screener 1. After entering the screener 1, the material first contacts the filter screen 2 installed on the inner wall. The raw ash with smaller particle size directly passes through the filter screen 2, and the large-sized coke blocks roll along the inclined surface of the filter screen 2 and fall from the gap between the lowest point of the filter screen 2 and the side wall of the screener 1. The falling large-sized coke blocks will fall on one of the first guide plate 4, the second guide plate 5, and the third guide plate 6, so that the coke blocks fall from different horizontal positions to avoid falling from one point, and fully utilize the working surface of the counter-rotating crushing component. The screened raw ash falls from the left part of the lower opening of the screener 1 into the transition chamber in the crusher 9, and then falls directly into the transition bin 13. The coke blocks fall from the right part of the lower opening of the screener 1 into the crushing chamber in the crusher 9, and are crushed by the extrusion force and shear force. The crushed particles fall into the transition bin 13 and are then introduced into the ash conveying bin pump, completing an efficient operation process from screening to crushing and then to transportation.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A jaw counter-rotating screening crusher, comprising a screener (1), a crusher (9) and a transition chamber (13), characterized in that: The lower end of the screener (1) is mounted on the upper end of the crusher (9), and the upper end of the transition bin (13) is mounted on the lower end of the crusher (9). The screener (1), crusher (9) and transition bin (13) all have two upper and lower openings, and the screener (1), crusher (9) and transition bin (13) are interconnected. A counter-rotating crushing assembly is installed in the crusher (9).

2. The jaw counter-rotating screening crusher according to claim 1, characterized in that: The counter-rotating crushing assembly comprises an active roller (11) and a driven roller (14), wherein the active roller (11) and the driven roller (14) are both rotatably connected to a crusher (9), a reduction motor (12) is installed on the surface of the crusher (9), and the reduction motor (12) is used to drive the active roller (11) to rotate, and the active roller (11) drives the driven roller (14) to rotate counter-rotatingly through gear transmission.

3. The jaw counter-rotating screening crusher according to claim 1, characterized in that: The inner wall of the sifter (1) is provided with a filter screen (2), and the filter screen (2) is used for sifting raw ash.

4. The jaw counter-rotating screening crusher according to claim 3, characterized in that: The filter screen (2) is arranged obliquely and faces the lower part of the upper opening of the sifter (1), and there is a gap between the lowest point of the filter screen (2) and the side wall of the sifter (1).

5. The jaw counter-rotating screening crusher according to claim 4, characterized in that: The inner wall of the sifter (1) is fixedly connected with a diverter plate (3), one end of the diverter plate (3) is fixedly connected to the end of the filter screen (2) at the lowest point, and the other end divides the lower opening of the sifter (1) into two left and right parts.

6. The jaw counter-rotating screening crusher according to claim 5, characterized in that: The inner wall of the sifter (1) is fixedly connected to a first guide plate (4) arranged obliquely, the inner wall of the sifter (1) is fixedly connected to a second guide plate (5) arranged obliquely, and the inner wall of the sifter (1) is fixedly connected to a third guide plate (6) arranged obliquely, a gap is provided between the highest point of the first guide plate (4) and the side wall of the sifter (1), and the gap between the highest point of the first guide plate (4) and the side wall of the sifter (1) is smaller than the gap between the lowest point of the filter screen (2) and the side wall of the sifter (1). There is a gap between the highest point of the second guide plate (5) and the side wall of the screen (1), and the gap between the highest point of the second guide plate (5) and the side wall of the screen (1) is smaller than the gap between the highest point of the first guide plate (4) and the side wall of the screen (1), the highest point of the third guide plate (6) is connected to the side wall of the screen (1), the length of the first guide plate (4) is greater than the length of the second guide plate (5), and the length of the second guide plate (5) is greater than the length of the third guide plate (6).

7. The jaw counter-rotating screening crusher according to claim 5, characterized in that: A partition plate (10) is fixedly connected to the inner wall of the crusher (9), and the partition plate (10) divides the inner space of the crusher (9) into a crushing chamber and a transition chamber. The counter-rotating crushing assembly is located in the crushing chamber. The upper opening of the crusher (9) includes a coke block inlet (15) and an ash inlet (16). The ash inlet (16) is connected to the transition chamber, and the coke block inlet (15) is connected to the crushing chamber. The left part of the lower opening of the screener (1) is aligned with the ash inlet (16), and the right part of the lower opening of the screener (1) is aligned with the coke block inlet (15).

Images