一种煤磨机用分别粉磨装置
By introducing a screening chamber and a multi-stage grinding chamber into the coal mill, primary and secondary grinding of coal powder is achieved, solving the problem of uneven and fine coal powder in existing equipment and improving combustion stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUICHANG HONGSHI CEMENT CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-17
AI Technical Summary
Existing coal mills can only perform one grinding cycle, resulting in insufficient grinding of some coal lumps, which affects the uniformity and fineness of the coal powder and the stability of combustion.
A separate grinding device was designed, comprising a screening chamber, a grinding bin, grinding chamber I, and grinding chamber II. Through primary and secondary grinding processes, coal powder is screened using an inverted V-shaped screen plate, and secondary grinding of coarse coal powder is achieved by combining a drive assembly and a transmission assembly, ensuring thorough grinding.
It improves the overall uniformity and fineness of pulverized coal, ensures the combustion stability of pulverized coal, and prevents some coal lumps from being insufficiently ground.
Smart Images
Figure CN224507264U_ABST
Abstract
Claims
1. A separate grinding device for a coal mill, characterized in that: It includes a screening chamber (1), a grinding chamber (2), a grinding chamber I (4), and a grinding chamber II (5); A support (101) is fixedly connected to the outside of the screening chamber (1). The grinding chamber (2) is fixedly connected to the upper end of the screening chamber (1). The bottom end of the screening chamber (1) is fixedly connected to the feeding chamber (102). An upper grinding assembly (3) is provided on the grinding chamber (2). A guide cover (201) is fixedly installed inside the grinding chamber (2). The grinding chamber I (4) and grinding chamber II (5) are fixedly connected to the front and rear sides of the screening chamber (1) respectively. A front grinding roller assembly (8) is provided inside the grinding chamber I (4). A drive assembly (6) for driving the front grinding roller assembly (8) is provided on the outside of the grinding chamber I (4). A rear grinding roller assembly (9) is provided in the grinding chamber II (5). A transmission assembly (7) is provided between the front grinding roller assembly (8) and the rear grinding roller assembly (9). An inverted V-shaped screen plate (103) is fixedly installed inside the screening chamber (1). The two sides of the inverted V-shaped screen plate (103) extend into the grinding chamber I (4) and the grinding chamber II (5) respectively. A guide plate (104) in the extension support (101) is fixedly installed on the inner side of both the grinding chamber I (4) and the grinding chamber II (5).
2. A separate grinding device for a coal mill according to claim 1, characterized in that: The upper end of the grinding chamber (2) is fixedly connected to a feed hopper (202), and the feed hopper (202) is symmetrically distributed on both sides of the upper end of the grinding chamber (2).
3. A separate grinding device for a coal mill according to claim 1, characterized in that: The upper grinding assembly (3) includes a first motor (301), a moving grinding blade (302), and a rotating base (303). The first motor (301) is fixedly installed in the middle of the upper end of the grinding chamber (2). The rotating base (303) is fixedly connected to the drive end of the first motor (301) through a connecting shaft. Fixed grinding blades (203) are spaced apart on the inner wall of the grinding chamber (2), and the moving grinding blades (302) are spaced apart on the rotating base (303).
4. A separate grinding device for a coal mill according to claim 1, characterized in that: The drive assembly (6) includes a second motor (601) and two front gears (602). The second motor (601) is fixedly installed on the outside of the grinding chamber I (4). The front grinding roller assembly (8) includes a front main grinding roller (801) and a front auxiliary grinding roller (802) rotatably installed on the grinding chamber I (4). The end of the front main grinding roller (801) is fixedly connected to the drive end of the second motor (601). The two front gears (602) are respectively fixedly sleeved on the front main grinding roller (801) and the front auxiliary grinding roller (802), and the two front gears (602) mesh with each other.
5. A separate grinding device for a coal mill according to claim 4, characterized in that: The transmission assembly (7) includes a front pulley (701), a transmission belt (702), a rear pulley (703), and two rear gears (704). The front pulley (701) is fixedly connected to the end of the front auxiliary grinding roller (802). The rear grinding roller assembly (9) includes a rear main grinding roller (901) and a rear auxiliary grinding roller (902) rotatably mounted on the grinding chamber II (5). The rear pulley (703) is fixedly connected to the end of the rear main grinding roller (901). The transmission belt (702) is rolled between the front pulley (701) and the rear pulley (703). The two rear gears (704) are respectively fixedly sleeved on the rear main grinding roller (901) and the rear auxiliary grinding roller (902), and the two rear gears (704) mesh with each other.
6. A separate grinding device for a coal mill according to claim 5, characterized in that: The diameter of the front pulley (701) is the same as that of the rear pulley (703).