Ash deposition prevention device for connecting pipeline of raw material vertical mill
By installing anti-accumulation devices at the ash accumulation point of the raw material vertical mill connection pipe, including a settlement ash bucket and a lower ash pipe, the problems of increased ventilation resistance and reduced output caused by ash accumulation are solved, and the effects of ventilation improvement, power consumption reduction and output improvement are achieved.
Patent Information
- Application Number
- CN202421478282.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-26
AI Technical Summary
Ash accumulation is prone to occur in the pipes of vertical mill connecting raw materials, resulting in a decrease in ventilation area, an increase in ventilation resistance, a significant increase in fan power consumption, and affecting the raw materials production and stable mill operation.
Design a dust accumulation device, which includes opening a square opening at the dust accumulation of the hot air inlet and outgrowth pipes, and connecting the settlement ash bucket and the lower dust pipe. Using the design of the settlement ash bucket and the gasification plate, combined with a zipper and a wind locking flip valve, the effective collection and transportation of powder is achieved.
It effectively reduces the accumulation of dust in the connecting pipes, improves ventilation, reduces fan power consumption, improves raw material output, and reduces the labor intensity of workers during cleaning.
Smart Images
Figure CN222872394U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dust collection and treatment, in particular to a dust accumulation prevention device for a raw material vertical mill connecting pipeline. Background Art
[0002] The raw material vertical mill integrates crushing, drying, grinding, and graded transportation. It has high production efficiency and can grind block, granular and powdered raw materials into the required powdered materials. The connecting pipes of the raw material vertical mill include the mill inlet pipe and the mill outlet pipe. The angle of the mill inlet hot air pipe is relatively small at the mill inlet pipe, and there is a horizontal pipe on the mill outlet to the cyclone inlet pipe. It has been found that powders have accumulated in piles at these two places during shutdowns over the years. According to the design principle, the pipes at the dust accumulation site are relatively short, and the powdered materials are finer. The wind speed at this site is sufficient to carry the materials away. However, the actual situation is that during the production start-up and shutdown process and when the materials change, it is often necessary to adjust the wind parameters to stabilize the mill working conditions, which causes the wind speed in the pipe to change. When the air volume is instantaneously small, large particles of materials are prone to deposition. Due to the existence of dust accumulation, the ventilation area of the pipeline is reduced, the ventilation resistance of the pipeline is increased, and the power consumption of the fan is significantly increased. At the same time, if the dust accumulation in the mill inlet pipeline is serious, the air intake volume will be reduced, which will directly affect the raw material output, resulting in a decrease in the output of the raw material vertical mill, an increase in energy consumption, and unstable operation of the mill. It is impossible to provide sufficient raw materials for the kiln, affecting subsequent production. When cleaning the dust accumulation in the pipeline, it is necessary to stop the material and shut down for maintenance. During each maintenance, the amount of dust to be processed is large, and the labor intensity of the workers is also high. If the cleaning is not thorough, the raw material output cannot be increased. Utility Model Content
[0003] The utility model provides a dust accumulation prevention device for a raw meal vertical mill connecting pipeline, which is used to solve the problem that dust is easily accumulated in the existing connecting pipeline, resulting in reduced pipeline ventilation area, increased ventilation resistance, significantly increased fan power consumption and reduced raw meal vertical mill output.
[0004] The utility model provides an anti-dust accumulation device for a raw meal vertical mill connecting pipeline, comprising: a raw meal vertical mill, wherein the inlet of the raw meal vertical mill is connected with an inlet hot air duct, the outlet of the raw meal vertical mill is connected with a horizontal outlet mill pipeline, square openings are provided at the bottoms of the inlet hot air duct and the outlet mill pipeline where dust accumulates, and anti-dust accumulation devices are provided at the square openings, and the anti-dust accumulation device comprises: a sedimentation ash hopper, wherein the top of the sedimentation ash hopper is respectively connected with the square openings at the bottoms of the inlet hot air duct and the outlet mill pipeline; the bottom of each sedimentation ash hopper is sealed and connected with a lower ash pipe, the other end of each lower ash pipe is sealed and connected to the same zipper machine, the outlet end of the zipper machine is sealed and connected with an air-locking flap valve, and the air-locking flap valve is sealed and connected to a raw meal conveying chute.
[0005] Preferably, the sedimentation ash hopper is a square funnel structure, and the lower ash pipe is a square pipe.
[0006] Preferably, a plurality of ash baffles are obliquely installed on one group of two opposite side walls in the settling ash hopper, two adjacent ash baffles are installed in a staggered manner, and the inclined lower end of each ash baffle suspended inside the settling ash hopper faces the bottom of the settling ash hopper.
[0007] Preferably, a plurality of gasification plates are evenly distributed on the four side walls of the settling ash hopper.
[0008] Preferably, an anti-blocking component is provided at the connection between the settling ash hopper and the lower ash pipe, and the anti-blocking component includes a square shell that connects the settling ash hopper and the lower ash pipe up and down, and a horizontal fixing rod is fixedly connected to the inner wall of the shell, and a vertical rod is rotatably connected to the middle position of the fixing rod, and the two ends of the vertical rod are respectively fixedly connected to the upper bulk material cover and the lower bulk material cover; the upper bulk material cover extends to the interior of the settling ash hopper, and the lower bulk material cover extends to the interior of the lower ash pipe.
[0009] Preferably, the upper bulk material cover and the lower bulk material cover are not in contact with the inner walls of the ash settling hopper and the lower ash pipe, and there is an annular gap for the accumulated ash to slide downward.
[0010] Preferably, the upper bulk material cover is a conical cover-shaped structure, and the end of the vertical rod extends to the top of the upper bulk material cover and is connected thereto.
[0011] Preferably, the upper bulk material cover is formed by splicing a plurality of partitions, all of which are fan-shaped plates, and the tops of the partitions are connected to each other; fan-shaped empty grooves are provided between adjacent partitions.
[0012] Preferably, the lower bulk material cover is a conical sealing cover with the top fixed to the end of the vertical rod.
[0013] The utility model provides an anti-dust accumulation device for the raw meal vertical mill connecting pipe. By adding the anti-dust accumulation device at the dust accumulation locations of the hot air inlet pipe and the outlet pipe, the clogging of the connecting pipe and the waste of materials can be avoided, the ventilation of the connecting pipe is improved, the raw meal output is increased, and the guarantee for subsequent kiln production is provided, while the labor intensity of workers during cleaning is also reduced.
[0014] The ash settling hopper in the device is of appropriate size and has good wind locking performance. The ash collection and ash conveying processes are smooth. The wind shield and gasification plate are used to enhance the sedimentation effect and anti-ash accumulation effect. The anti-blocking components are used to greatly improve the powder collection efficiency. At the same time, the powder is made looser and not easy to accumulate at the connection between the ash settling hopper and the lower ash pipe, ensuring the normal ash conveying.
[0015] The device is developed for the existing production process without major changes to the original system. It is simple to manufacture, requires little investment, and has a significant effect on reducing energy consumption. It can be quickly applied to actual production and has achieved a reduction of 0.5kwh / t in power consumption in the raw material process. Based on the production of 260,000 tons of raw materials per month, the electricity fee is calculated at 0.51 yuan per kilowatt-hour, saving 66,300 yuan in electricity fees per month. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 A schematic diagram of the structure of a dust accumulation prevention device for a raw material vertical mill connecting pipeline provided by one embodiment of the utility model;
[0018] Figure 2 A schematic diagram of the structure and connection of a settling ash hopper and a lower ash pipe provided in one embodiment of the utility model;
[0019] Figure 3 This is a structural expansion diagram of an upper bulk material cover provided in one embodiment of the utility model.
[0020] Description of reference numerals:
[0021] 1-raw meal vertical mill, 2-hot air inlet duct, 3-mill outlet duct, 4-ash settling hopper, 5-ash lower pipe, 6-zipper machine, 7-air locking flap valve, 8-raw meal conveying chute, 41-ash baffle plate, 42-gasification plate, 431-shell, 432-fixing rod, 433-vertical rod, 434-upper bulk material cover, 435-lower bulk material cover, 436-partition plate, 437-fan-shaped empty slot. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the utility model.
[0023] like Figure 1The utility model provides an anti-dust accumulation device for a raw meal vertical mill 1 connecting pipeline, comprising: a raw meal vertical mill 1, a mill hot air inlet pipeline 2 connected to the inlet of the raw meal vertical mill 1, a horizontal mill outlet pipeline 3 connected to the outlet of the raw meal vertical mill 1, square openings are provided at the bottoms of the mill hot air inlet pipeline 2 and the mill outlet pipeline 3 where dust accumulates, and anti-dust accumulation devices are provided at the square openings, and the anti-dust accumulation devices comprise: a sedimentation ash hopper 4, the top of the sedimentation ash hopper 4 is respectively connected to the square openings at the bottom of the mill hot air inlet pipeline 2 and the mill outlet pipeline 3; the bottom of each sedimentation ash hopper 4 is sealed and connected to a lower ash pipe 5, the other end of each lower ash pipe 5 is sealed and connected to the same zipper machine 6, the discharge end of the zipper machine 6 is sealed and connected to an air locking flap valve 7, and the air locking flap valve 7 is sealed and connected to a raw meal conveying chute 8.
[0024] Without major changes to the original system, a square opening is opened at the dust accumulation place of the hot air duct 2 entering the mill and the duct 3 exiting the mill, and a sedimentation hopper 4 is connected to the square opening, so that the powder that is easy to deposit due to pipeline friction, air volume adjustment, etc. in the connecting pipeline is directly settled into the sedimentation hopper 4 to avoid its accumulation in the connecting pipeline, which can effectively reduce the dust accumulation in the connecting pipeline, thereby not affecting the ventilation of the connecting pipeline, reducing the ventilation resistance, significantly reducing the power consumption of the fan, and avoiding the problem of reduced output of the raw material vertical mill 1. After the powder falls into the sedimentation hopper 4, it goes down into the ash pipe 5, and then is uniformly sent to the zipper machine 6 for transportation. After passing through the air-locking flap valve 7, it is sent to the raw material conveying chute 8 to return to the production system. The entire ash conveying process is carried out smoothly under sealed conditions, preventing the occurrence of fly ash and dust, and also avoiding the waste of materials. By adding an anti-ash accumulation device, the blockage of material accumulation and material waste in the connecting pipeline can be avoided, the ventilation of the connecting pipeline is improved, the raw material output is increased, and it provides a guarantee for the subsequent kiln production, and also reduces the labor intensity of workers during cleaning.
[0025] Preferably, the ash settling hopper 4 is a square funnel structure, and the ash lowering pipe 5 is a square tube. The ash settling hopper 4 is designed to be funnel-shaped, which is convenient for receiving and guiding the powder to be discharged smoothly, and improves the efficiency of ash discharge and ash transportation. The internal space of the square funnel structure and the square tube is relatively large, the powder flow rate is relatively slow, and it is also less likely to be filled. Compared with the circular structure, the aperture and outlet of the square structure are larger, the powder will be easier to disperse during the flow process, and the material discharge speed is faster, thereby reducing the possibility of powder accumulation in the ash settling hopper 4 and the ash lowering pipe 5.
[0026] like Figure 2Preferably, a plurality of ash baffles 41 are obliquely installed on one set of two opposite side walls in the ash hopper 4, and two adjacent ash baffles 41 are installed in a staggered manner, and the oblique lower end of each ash baffle 41 suspended in the ash hopper 4 faces the bottom of the ash hopper 4. The ash baffles 41 change the flow path and flow rate of the powder material, making the sedimentation effect better, and can also block the hot air to a certain extent, preventing it from entering the dust prevention device too much and causing waste and loss.
[0027] like Figure 2 Preferably, a plurality of gasification plates 42 are evenly distributed on the four side walls of the ash hopper 4. The gasification plates 42 on the four side walls of the ash hopper 4 are used to regularly blow the wall panels to prevent dust accumulation on the side walls, and the dust lowering pipe 5 and the zipper machine 6 can be used to enhance the dust accumulation prevention effect of the ash hopper 4.
[0028] like Figure 2 Preferably, an anti-blocking component is provided at the connection between the settling ash hopper 4 and the lower ash pipe 5, and the anti-blocking component includes a square shell 431 which connects the settling ash hopper 4 and the lower ash pipe 5 up and down, and a horizontal fixing rod 432 is fixedly connected to the inner wall of the shell 431, and a vertical rod 433 is rotatably connected to the middle position of the fixing rod 432, and the two ends of the vertical rod 433 are respectively fixedly connected to an upper bulk material cover 434 and a lower bulk material cover 435; the upper bulk material cover 434 extends to the interior of the settling ash hopper 4, and the lower bulk material cover 435 extends to the interior of the lower ash pipe 5.
[0029] The fixed rod 432 is transversely fixed in the housing 431. Preferably, the cross section of the fixed rod 432 is triangular, which can prevent the formation of material accumulation on the fixed rod 432. The fixed rod 432 can support the vertical rod 433 and the upper bulk material cover 434 and the lower bulk material cover 435 thereon. The vertical rod 433 is rotatably installed in the middle position of the fixed rod 432. When the powder falls and impacts the upper bulk material cover 434, it can drive the vertical rod 433 and the lower bulk material cover 435 to rotate accordingly, thereby buffering the impact of the powder and the airflow, so that the powder falls normally and is not easy to raise dust, which greatly improves the powder collection efficiency. At the same time, during the rotation, the powder is looser and easier to fall and transport, and is not easy to accumulate at the connection between the sedimentation ash hopper 4 and the lower ash pipe 5, avoiding affecting the normal transportation of the zipper machine 6. At the same time, the flexibly rotating anti-blocking component can also reduce its own wear and tear and extend its service life.
[0030] Preferably, the upper bulk material cover 434 and the lower bulk material cover 435 are not in contact with the inner walls of the ash settling hopper 4 and the lower ash pipe 5, and there is an annular gap for the accumulated ash to slide downward.
[0031] Preferably, the upper bulk material cover 434 is a conical cover structure, and the end of the vertical rod 433 extends to the top of the upper bulk material cover 434 and is connected thereto. The conical cover structure is a structure with a relatively sharp top, which facilitates the upper bulk material cover 434 to rotate under the impact of the powder, and facilitates the loosening and dispersion of the powder, so that the powder can quickly slide down the upper bulk material cover 434 to its edge and then fall into the lower ash pipe 5.
[0032] like Figure 3 Preferably, the upper bulk material cover 434 is formed by splicing a plurality of partitions 436, all of which are fan-shaped plates, and the tops of the partitions 436 are connected to each other; fan-shaped slots 437 are provided between adjacent partitions 436. In order to speed up the falling of the upper bulk material cover 434, fan-shaped slots 437 are further provided between the partitions 436, so that part of the powder can fall along the fan-shaped slots 437 to avoid blockage at the discharge port of the sedimentation hopper 4.
[0033] like Figure 2 Preferably, the lower bulk cover 435 is a conical sealing cover with the top fixed to the end of the vertical rod 433. The lower bulk cover 435 can prevent the airflow in the lower ash pipe 5 from flowing back and avoid secondary dust in the sedimentation ash hopper 4. The conical structure is also used to promote the powder to slide down, so that the powder changes its flow direction many times under the action of the upper bulk cover 434 and the lower bulk cover 435, and can only fall along the lower ash pipe 5 to the zipper machine 6, which promotes the normal ash conveying.
[0034] The present invention is further described in detail below in conjunction with specific embodiments.
[0035] Example 1
[0036] The dust-prevention device for connecting the pipeline of the raw material vertical mill 1 is specifically designed to prevent the deposition of powder in the connecting pipeline due to pipeline friction, air volume adjustment, etc., and can directly settle these easily deposited powders in the dust accumulation places of the hot air inlet pipeline 2 and the outlet pipeline 3 into the sedimentation ash hopper 4, which can effectively connect the dust accumulation in the pipeline without affecting the ventilation of the connecting pipeline. After the powder falls into the sedimentation ash hopper 4 with a square funnel structure, the flow path and flow rate of the powder are changed under the action of multiple dust baffles 41, so that the sedimentation effect is better. At the same time, the gasification plates 42 on the four side walls of the sedimentation ash hopper 4 are used to regularly blow the wall panels to prevent dust accumulation on the side walls. The powder finally settles and falls into the square tube-style ash lowering pipe 5, and then is uniformly sent to the zipper machine 6 for transportation. After passing through the air-locking flap valve 7, it is sent to the raw material conveying chute 8 to return to the production system. The entire ash conveying process is carried out smoothly under sealed conditions to prevent the occurrence of fly ash and dust, and also avoid the waste of materials.
[0037] Example 2
[0038] On the basis of the above embodiments, in this embodiment, an anti-blocking component is provided at the connection between the settling ash hopper 4 and the lower ash pipe 5, and the fixed rod 432 is transversely fixed in the shell body 431 to play a supporting role. The vertical rod 433 is rotatably installed in the middle position of the fixed rod 432. When the powder falls and impacts the upper bulk material cover 434, it can drive the vertical rod 433 and the lower bulk material cover 435 to rotate accordingly, thereby buffering the impact force of the powder and the airflow, so that the powder falls normally without dust, which greatly improves the powder collection efficiency. At the same time, the powder is made looser during rotation, and it is easier to fall and transport ash through the annular gap between the upper bulk material cover 434 and the lower bulk material cover 435 and the inner walls of the settling ash hopper 4 and the lower ash pipe 5, and it is not easy to accumulate at the connection between the settling ash hopper 4 and the lower ash pipe 5.
[0039] The upper bulk material cover 434 rotates under the impact of the powder, and part of the powder falls along the fan-shaped slot 437 therein, and part of the powder can quickly slide down along the partition 436 to its edge and then fall into the lower ash pipe 5, avoiding blockage at the discharge port of the sedimentation hopper 4. The lower bulk material cover 435 can prevent the airflow in the lower ash pipe 5 from backflowing during rotation, and at the same time promote the powder to slide down, ensuring the normal ash conveying.
[0040] It should be noted that in the present invention, the detailed structure of some devices is not described in detail, but belongs to the prior art known to those skilled in the art, so it will not be repeated here. In addition, the parts not involved in the device are the same as the prior art or can be implemented by the prior art.
[0041] It should be noted that pressure sensors, flow meters or temperature sensors are installed on the delivery pipelines inside the device between different units and equipment. Different valves are also installed, such as pressure relief valves, pressure regulating valves, safety valves, etc., which are used to adjust and stabilize the pressure of the entire device.
[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A dust accumulation prevention device for a raw material vertical mill connecting pipeline, comprising: A raw meal vertical mill, wherein the inlet of the raw meal vertical mill is connected to a hot air inlet duct, and the outlet of the raw meal vertical mill is connected to a horizontal outlet duct, and is characterized in that square openings are provided at the bottoms of the hot air inlet duct and the outlet duct where ash accumulates, and anti-ash accumulation devices are provided at the square openings, and the anti-ash accumulation devices include: a sedimentation hopper, the top of the sedimentation hopper is respectively connected to the square openings at the bottom of the hot air inlet duct and the outlet duct; the bottom of each of the sedimentation hoppers is sealed and connected to an ash lowering pipe, and the other end of each of the ash lowering pipes is sealed and connected to the same zipper machine, and the discharge end of the zipper machine is sealed and connected to an air-locking flap valve, and the air-locking flap valve is sealed and connected to the raw meal conveying chute.
2. The dust accumulation prevention device for the raw material vertical mill connecting pipe according to claim 1 is characterized in that: The ash settling hopper is a square funnel structure, and the ash lowering pipe is a square pipe.
3. The dust accumulation prevention device for the raw material vertical mill connecting pipe according to claim 1 is characterized in that: A plurality of ash baffles are obliquely installed on two opposite side walls of one group in the ash settling hopper, two adjacent ash baffles are installed in a staggered manner, and each ash baffle is suspended in the air inside the ash settling hopper with its oblique lower end facing the bottom of the ash settling hopper.
4. The dust accumulation prevention device for the raw material vertical mill connecting pipeline according to claim 1 is characterized in that: A plurality of gasification plates are evenly distributed on the four side walls of the settling ash hopper.
5. The dust accumulation prevention device for the raw material vertical mill connecting pipeline according to any one of claims 1 to 4, characterized in that: An anti-blocking component is provided at the connection between the settling ash hopper and the lower ash pipe, and the anti-blocking component includes a square shell which connects the settling ash hopper and the lower ash pipe up and down, and a horizontal fixing rod is fixedly connected to the inner wall of the shell, and a vertical rod is rotatably connected to the middle position of the fixing rod, and an upper bulk material cover and a lower bulk material cover are respectively fixedly connected at both ends of the vertical rod; the upper bulk material cover extends to the interior of the settling ash hopper, and the lower bulk material cover extends to the interior of the lower ash pipe.
6. The dust accumulation prevention device for the raw material vertical mill connecting pipeline according to claim 5 is characterized in that: The upper bulk material cover and the lower bulk material cover are not in contact with the inner walls of the ash settling hopper and the lower ash pipe, and there is an annular gap for the accumulated ash to slide downward.
7. The dust accumulation prevention device for the raw material vertical mill connecting pipeline according to claim 5 is characterized in that: The upper bulk material cover is a conical cover-shaped structure, and the end of the vertical rod extends to the top of the upper bulk material cover and is connected thereto.
8. The dust accumulation prevention device for the raw material vertical mill connecting pipeline according to claim 5 is characterized in that: The upper bulk material cover is formed by splicing a plurality of partitions, all of which are fan-shaped plates, and the tops of the partitions are connected to each other; fan-shaped slots are provided between adjacent partitions.
9. The dust accumulation prevention device for the raw material vertical mill connecting pipeline according to claim 5 is characterized in that: The lower bulk material cover is a conical sealing cover with the top fixed on the end of the vertical rod.