Medium-speed coal milling device applied to power plant
By designing a speed-grinding device including coal milling rollers and coal milling platforms in a thermal power plant, the reduction of discharge speed and discontinuity caused by screens in existing coal mills is solved, and the coal mass is realized Efficient, continuous grinding and discharge.
Patent Information
- Application Number
- CN202420042769.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-01-05
AI Technical Summary
The use of screens in the coal mill of existing thermal power plants during the second crushing process leads to a reduced discharge speed and the screen cannot operate continuously when it is blocked, which is inefficient.
Design a fast coal grinding device including a mounting frame, work box, coal grinding mechanism and power components, and use two sets of horizontally symmetrical coal grinding rollers and coal grinding tables to form abrasive channel, combining the lead part and the spill-proof pipe to ensure the coal material Continuous grinding and efficient discharge.
The continuous coal grinding operation of coal materials is achieved, the efficiency of coal grinding is improved, the step-by-step grinding and efficient discharge of coal materials is ensured, and the problems of low efficiency and discontinuity in the existing technology are solved.
Smart Images
Figure CN222267381U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power plant equipment, in particular to a medium-speed coal grinding device used in a power plant. Background Art
[0002] Thermal power generation is currently the main method of power generation. During the thermal power generation process, a boiler is needed to heat water to generate steam to drive the power generation equipment to work and generate electricity resources. During the operation of the boiler, a large amount of coal powder is consumed. Coal powder is usually produced by grinding raw coal.
[0003] Chinese patent CN212348896U proposes an automatic feeding coal mill for thermal power plants. This coal mill achieves coal grinding by two-stage crushing. However, in this design, there is a screen in the second crushing, which reduces the feeding speed. Once the screen is blocked, the device cannot operate continuously and has low efficiency. Utility Model Content
[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and then propose a medium-speed coal grinding device used in power plants.
[0005] The technical solution adopted by the utility model to solve its technical problems is:
[0006] A medium-speed coal grinding device used in power plants comprises a mounting frame, a working box is arranged on the mounting frame, a feed port and a discharge port are arranged on the working box, and two groups of coal grinding mechanisms are horizontally symmetrically arranged in the working box; the coal grinding mechanism comprises a coal grinding roller and a driving part, there are two coal grinding rollers and they are rotatably arranged in the working box, the two coal grinding rollers are connected to the driving part arranged outside the working box so that the driving part operates to make the two coal grinding rollers rotate inward at the same time, and an abrasive channel is formed between the two coal grinding rollers, and the two abrasive channels are both located below the feed port to increase the abrasive speed; a coal grinding box is also arranged in the working box, the coal grinding box is located below the two abrasive channels and its upper and lower ends are both open, a coal grinding table is matched in the coal grinding box, a grinding cavity with a gradually decreasing opening is formed between the coal grinding table and the coal grinding box, the grinding cavity is located above the discharge port, and the top of the coal grinding table is connected to a power component arranged in the working box so that the coal grinding table rotates in the coal grinding box.
[0007] Furthermore, the coal grinding box is a frustum structure that is wide at the top and narrow at the bottom to facilitate the feeding and centralized discharging of coal.
[0008] Furthermore, the upper part of the coal grinding table is a frustoconical structure that is narrow at the top and wide at the bottom, and the lower part of the coal grinding table is a frustoconical structure that is wide at the top and narrow at the bottom to facilitate the feeding and discharging of coal.
[0009] Furthermore, the power assembly includes a mounting seat, a rotating roller and a power unit; the mounting seat is arranged below the two groups of coal grinding mechanisms and in the middle position, a rotating roller is rotatably arranged on the mounting seat, the rotating roller is connected to the power unit so that the rotating roller rotates, and a coal grinding platform is connected to the bottom of the rotating roller.
[0010] Furthermore, the outer cover of the power assembly is provided with a protective shell to improve the protection effect of the power assembly.
[0011] Furthermore, the top of the protective shell is a sloping top structure to improve the material feeding effect.
[0012] Furthermore, an anti-overflow pipe is provided at the feed inlet to prevent material from overflowing through the feed inlet during the grinding process.
[0013] Furthermore, two sets of material guide parts are provided in the working box to improve the accuracy of coal entering the two abrasive channels and improve the abrasive effect. The two sets of material guide parts are both located below the feed port. The material guide parts are composed of two material guide plates and are tilted inward to form a material guide channel with a gradually decreasing opening. The two material guide channels are respectively located directly above the two abrasive channels.
[0014] Furthermore, a feed pipe is provided at the bottom of the coal grinding box, and the feed pipe is connected with the feed introduction channel and the discharge port to improve the feed effect of the coal.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] The utility model realizes continuous coal grinding operation, and the coal grinding work is carried out step by step, which greatly improves the coal grinding effect. The coal is first fed through the feed port, then primary grinding is carried out by two groups of coal grinding mechanisms, and then enters the coal grinding box. The coal is then ground step by step by the rotation operation of the coal grinding table, and finally the finished coal is obtained. The device has good continuity effect and high coal grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the internal structure of the utility model;
[0018] Figure 2 It is a schematic diagram of the external structure of the utility model;
[0019] Among them: 1. Mounting frame; 2. Working box; 21. Feed inlet; 22. Discharge outlet; 3. Overflow prevention pipe; 31. Feed guide plate; 4. Coal grinding roller; 41. Driving unit; 5. Coal grinding box; 51. Feeding pipe; 6. Mounting seat; 61. Rotating roller; 62. Coal grinding platform; 63. Power unit; 7. Protective casing. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The utility model is further described in combination with the drawings and embodiments:
[0021] See attached Figure 1 and attached Figure 2 As shown, a medium-speed coal grinding device used in a power plant comprises a mounting frame 1, a working box 2 is arranged on the mounting frame 1, a feed port 21 and a discharge port 22 are arranged on the working box 2, two groups of coal grinding mechanisms are arranged horizontally and symmetrically in the working box 2; the coal grinding mechanism comprises a coal grinding roller 4 and a driving part 41, two coal grinding rollers 4 are rotatably arranged in the working box 2, the two coal grinding rollers are connected to the driving part 41 arranged outside the working box 2 so that the driving part 41 operates to make the two coal grinding rollers 4 rotate inward at the same time, and an abrasive channel is formed between the two coal grinding rollers 4, and the two abrasive channels are It is located below the feed port 21 to increase the grinding speed, wherein the driving part 41 is a commonly used means in the prior art and will not be elaborated in this application; a coal grinding box 5 is also provided in the working box 2, the coal grinding box 5 is located below the two grinding channels and both upper and lower ends thereof are open, a coal grinding platform 62 is provided in the coal grinding box 5, and an abrasive cavity with a gradually decreasing opening is formed between the coal grinding platform 62 and the coal grinding box 5, the abrasive cavity is located above the discharge port 22, and the top of the coal grinding platform 62 is connected to a power component arranged in the working box 2 to enable the coal grinding platform 62 to rotate in the coal grinding box 5.
[0022] In the specific implementation process of this device, the coal is first fed through the feed port 21, then primary grinding is performed by two groups of coal grinding mechanisms, and then enters the coal grinding box 5. The coal is then ground step by step by the rotation operation of the coal grinding table 62 to finally obtain coal.
[0023] The coal grinding box 5 is a frustum structure that is wide at the top and narrow at the bottom to facilitate the feeding and centralized discharge of coal.
[0024] The upper portion of the coal grinding table 62 is a frustum structure that is narrow at the top and wide at the bottom, and the lower portion of the coal grinding table 62 is a frustum structure that is wide at the top and narrow at the bottom to facilitate the feeding and discharging of coal.
[0025] Specifically, the power assembly includes a mounting seat 6, a rotating roller 61 and a power unit 63; the mounting seat 6 is arranged below the two groups of coal grinding mechanisms and in the middle position, and a rotating roller 61 is rotatably arranged on the mounting seat 6. The rotating roller 61 is connected to the power unit 63 so that the rotating roller 61 can rotate. The power unit 63 is a commonly used means in the prior art and will not be described in detail in this application. A coal grinding platform 62 is connected to the bottom of the rotating roller 61.
[0026] In order to improve the protection effect of the power component, a protective shell 7 is provided on the outer cover of the power component. In order to consider the material discharge effect of the protective shell 7, the top of the protective shell 7 is a sloping top structure.
[0027] In order to improve the feeding effect, an anti-overflow pipe 3 is provided at the feed inlet 21 to prevent the material from overflowing through the feed inlet 21 during the grinding process.
[0028] Among them, in order to improve the accuracy of coal entering the two abrasive channels and improve the abrasive effect, the present application provides two sets of material guide parts in the working box 2, both of which are located below the feed port 21. The material guide parts are composed of two material guide plates 31 and are tilted inward to form a material guide channel with a gradually decreasing opening. The two material guide channels are respectively located directly above the two abrasive channels.
[0029] A feeding pipe 51 is provided at the bottom of the coal grinding box 5, and the feeding pipe 51 is connected with the feeding channel and the discharge port 22 to improve the feeding effect of the coal.
[0030] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.
Claims
1. A medium-speed coal grinding device used in a power plant, characterized in that: The invention comprises a mounting frame (1), a working box (2) is arranged on the mounting frame (1), a material inlet (21) and a material outlet (22) are arranged on the working box (2), two groups of coal grinding mechanisms are arranged horizontally and symmetrically in the working box (2); the coal grinding mechanism comprises two coal grinding rollers (4) and a driving part (41), the two coal grinding rollers (4) are rotatably arranged in the working box (2), the two coal grinding rollers are connected to the driving part (41) arranged outside the working box (2) so that the two coal grinding rollers (4) rotate inward at the same time, and an abrasive channel is formed between the two coal grinding rollers (4). The two grinding channels are both located below the feed port (21); a coal grinding box (5) is also provided in the working box (2); the coal grinding box (5) is located below the two grinding channels and has upper and lower ends that are open; a coal grinding platform (62) is provided in the coal grinding box (5); a grinding cavity with a gradually decreasing opening is formed between the coal grinding platform (62) and the coal grinding box (5); the grinding cavity is located above the discharge port (22); and the top of the coal grinding platform (62) is connected to a power assembly provided in the working box (2) so that the coal grinding platform (62) rotates in the coal grinding box (5).
2. The medium-speed coal grinding device used in a power plant according to claim 1, characterized in that: The coal grinding box (5) is in the form of a frustum structure that is wide at the top and narrow at the bottom.
3. The medium-speed coal grinding device used in a power plant according to claim 1, characterized in that: The upper portion of the coal grinding table (62) is a frustoconical structure that is narrow at the top and wide at the bottom, and the lower portion of the coal grinding table (62) is a frustoconical structure that is wide at the top and narrow at the bottom.
4. The medium-speed coal grinding device used in a power plant according to claim 1, characterized in that: The power assembly comprises a mounting seat (6), a rotating roller (61) and a power unit (63); the mounting seat (6) is arranged below the two groups of coal grinding mechanisms and in the middle position; a rotating roller (61) is rotatably arranged on the mounting seat (6); the rotating roller (61) is connected to the power unit (63); and a coal grinding platform (62) is connected to the bottom of the rotating roller (61).
5. The medium speed coal grinding device used in a power plant according to claim 1, characterized in that: The outer cover of the power component is provided with a protective shell (7).
6. The medium speed coal grinding device used in a power plant according to claim 5, characterized in that: The top of the protective housing (7) is a sloping roof structure.
7. The medium-speed coal grinding device used in a power plant according to claim 1, characterized in that: An anti-overflow pipe (3) is provided at the feed inlet (21).
8. The medium-speed coal grinding device used in a power plant according to claim 1, characterized in that: The working box (2) is provided with two sets of material guiding parts, both of which are located below the feed port (21). The material guiding parts are composed of two material guiding plates (31) and are arranged to be inclined inwards to form a material guiding channel with a gradually decreasing opening. The two material guiding channels are respectively located directly above the two abrasive channels.
9. The medium-speed coal grinding device used in a power plant according to claim 1, characterized in that: A feed pipe (51) is provided at the bottom of the coal grinding box (5), and the feed pipe (51) is connected to the feed introduction channel and the discharge port (22).