Cement grinding fly ash batching system

Abstract

The utility model discloses a cement fly ash batching system, including storage tank, manual valve, conveying chute, the lower extreme of storage tank is installed with the shell, the middle part of shell is installed with the blanking tube, the inside installation of shell has the breather board of inclination setting, the breather board is connected on the blanking tube upper end, the manual valve is connected with blanking tube, the export of manual valve is connected with automatic valve, the export of automatic valve is connected with rotor scale, the maintenance cover of manual valve is connected with manual valve through the compactor, the conveying chute is connected with the export of rotor scale, through the pneumatic valve control compressed air to enter the shell, and the compressed air is blown into the inside of storage tank after passing through the breather board, then the compressed air is discharged from the blanking tube, can drive fly ash to discharge from the storage tank, can alleviate fly ash wall sticking situation while improving the flowability of fly ash, and fly ash discharges stably.

Description

Technical Field

[0001] This utility model relates to the field of cement production technology, specifically to a cement grinding fly ash batching system. Background Technology

[0002] Fly ash is an industrial waste produced by the combustion of pulverized coal, appearing as a grayish-white powder. In cement production, fly ash is used as an admixture to improve cement performance and reduce costs. When utilizing fly ash, it needs to be stored in steel tanks, and then conveyed to a grinding mill by a contact conveyor system.

[0003] Among the relevant technologies, a search revealed a scheme for an industrial solid waste fly ash resource utilization and treatment device (publication number CN119841102A), which includes a storage cylinder, a discharge pipe installed on the storage cylinder, a dispersion cylinder installed on the discharge pipe, the storage cylinder storing fly ash, and the fly ash being discharged through the discharge pipe when it is used.

[0004] However, during use, such a storage cylinder relies on the natural flow of fly ash, resulting in an unstable fly ash discharge rate. At the same time, fly ash is prone to sticking to the walls, requiring manual or vibratory cleaning. If fly ash sticks to the walls at higher points of the storage cylinder, manual cleaning poses certain risks, and the vibration of the vibrator may cause the fly ash to become more compacted, affecting its flowability. Utility Model Content

[0005] The purpose of this invention is to provide a cement grinding fly ash batching system to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cement grinding fly ash batching system, including a storage tank, an outer shell installed at the lower end of the storage tank, a feeding pipe installed in the middle of the outer shell, an inclined venting plate installed inside the outer shell, the venting plate being connected to the upper end of the feeding pipe, and compressed air being blown into the bottom of the storage tank through the venting plate, which can increase the fluidity of fly ash and reduce the severity of fly ash sticking to the wall;

[0007] A manual valve is connected to a feed pipe. An automatic valve is connected to the outlet of the manual valve. A rotor scale is connected to the outlet of the automatic valve. The rotor scale controls the discharge amount of fly ash, which can ensure the accuracy of fly ash dosage and avoid affecting cement quality due to fluctuations in the mix ratio.

[0008] The inspection cover of the manual valve is connected to the manual valve via a clamp. The manual valve and the automatic valve are designed in series, which can both manually control the discharge of fly ash and realize automated control.

[0009] A conveying chute is connected to the outlet of the rotor scale, and the inclination angle of the conveying chute is 4-10 degrees.

[0010] Furthermore, several annularly arranged air blowing pipes are installed on the lower part of the surface of the storage tank. The air blowing pipes are connected to air supply pipes. Since the fly ash at the bottom of the storage tank is under greater pressure, it is easy for it to stick to the wall. Compressed air can be used to clean the fly ash off the inner wall of the storage tank.

[0011] Furthermore, a support is welded to the inner wall of the outer shell, the vent plate is connected to the support, and a support rod is welded to the side of the support. The support rod supports the vent plate, improves the stability of the vent plate, and prevents the vent plate from deforming.

[0012] Furthermore, several pneumatic valves are installed on the lower surface of the housing, which can automatically control the supply of compressed air and reduce manual operation.

[0013] Furthermore, the manual valve includes a housing and a screw rotatably connected to the housing. A screw sleeve is screwed onto the screw, and a valve plate is fixedly connected to the screw sleeve. The valve plate is slidably connected to the housing. The inspection cover is located above the screw. The clamping device includes a bolt, which passes through the housing and is screwed with a nut. A spring and a pressure rod are sleeved on the bolt. The pressure rod is located on the upper surface of the inspection cover. Rotating the pressure rod to offset the inspection cover allows for quick opening of the inspection cover and convenient inspection of the screw.

[0014] Furthermore, the screw is welded with a sleeve, and a handle is inserted into the sleeve. Ball heads are screwed to both ends of the handle, making it easier to control the movement of the valve plate using the handle.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) Compressed air is controlled by a pneumatic valve to enter the outer shell, compressed and blown into the inside of the storage tank after passing through the vent plate. Then the compressed air is discharged from the discharge pipe, which can drive the fly ash out of the storage tank. This improves the fluidity of the fly ash and reduces the fly ash sticking to the wall, and the fly ash discharge is stable.

[0017] (2) Compressed air is sent into the blowing pipe through the air supply pipe. The blowing pipe can clean the fly ash from the inner wall of the storage tank. At the same time, the flow of compressed air is also conducive to the rapid discharge of fly ash, reducing the frequency of manual cleaning and reducing maintenance costs.

[0018] (3) The rotor scale controls the amount of fly ash discharged. It has high metering accuracy and can more accurately control the amount of fly ash added. The conveying chute delivers the fly ash to the mill head. The conveying chute adopts a fully enclosed structure to avoid fly ash leakage, which meets environmental protection requirements and reduces fly ash loss. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the entire utility model;

[0020] Figure 2This is a schematic diagram of the pressure bar pressing down on the inspection cover according to this utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the screw and the screw sleeve of this utility model;

[0022] Figure 4 This is a cross-sectional view of the outer casing of this utility model.

[0023] In the diagram: 1. Storage tank; 2. Air outlet pipe; 3. Air supply pipe; 4. Air blowing pipe; 5. Outer shell; 6. Housing; 7. Automatic valve; 8. Rotary scale; 9. Conveying chute; 10. Inspection cover; 11. Bolt; 12. Pressure rod; 13. Spring; 14. Nut; 15. Handle; 16. Screw; 17. Valve plate; 18. Pneumatic valve; 19. Feed pipe; 20. Support; 21. Vent plate; 22. Support rod; 23. Screw sleeve; 24. Sleeve; 25. Ball head. 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] Example:

[0026] Please see Figure 1-4 This utility model provides a technical solution: a cement grinding fly ash batching system, including a storage tank 1, the storage tank 1 is made of steel, the upper end of the storage tank 1 is equipped with an air outlet pipe 2, the air outlet pipe 2 can be connected to equipment such as a cyclone dust collector, which can reduce the leakage of fly ash, and a radar level gauge can also be installed on the top of the storage tank 1 to check the amount of fly ash inside the storage tank 1.

[0027] The storage tank 1 is equipped with an outer shell 5 at its lower end. A feed pipe 19 is installed in the middle of the outer shell 5. An inclined vent plate 21 is installed inside the outer shell 5. The vent plate 21 is connected to the upper end of the feed pipe 19. The vent plate 21 can be made of stainless steel, which makes the vent plate 21 have good load-bearing capacity and long service life. Compressed air passes through the vent plate 21 and is blown into the fly ash. The fly ash flows with the air, ensuring a stable fly ash discharge.

[0028] The manual valve is connected to the feed pipe 19. The outlet of the manual valve is connected to the automatic valve 7. The outlet of the automatic valve 7 is connected to the rotor scale 8. The rotor scale 8 can also be replaced by a single-tube screw metering scale, which can realize the control of the amount of fly ash. The inspection cover 10 of the manual valve is connected to the manual valve through a clamp. The automatic valve 7 has a similar structure to the manual valve. The automatic valve 7 uses a cylinder to control the movement of the valve plate 17. When the automatic valve 7 malfunctions, the manual valve can be opened without delaying the discharge of fly ash.

[0029] The conveying chute 9 is connected to the outlet of the rotor scale 8. The inclination angle of the conveying chute 9 is 4-10 degrees. Compressed air is injected into the lower shell 6 (air chamber) of the conveying chute 9 through a blower. The air permeates evenly into the fly ash in the upper shell 6 through the micropores of the permeable layer, so that the fly ash is in a flowing state. In addition, the conveying chute 9 has a certain inclination, so as to realize the automatic transportation of fly ash.

[0030] In this embodiment, as Figure 1 As shown, several annularly arranged air blowing pipes 4 are installed on the lower part of the surface of the storage tank 1. The air blowing pipes 4 are connected to air supply pipes 3, which provide compressed air to all the air blowing pipes 4. The compressed air can be used to clean the inner wall of the storage tank 1. When the inner wall of the storage tank 1 has a serious wall adhesion phenomenon, the fly ash inside the storage tank 1 can be emptied, and then the fly ash can be cleaned by knocking and vibration.

[0031] In this embodiment, as Figure 4 As shown, a support 20 is welded to the inner wall of the outer shell 5, and the vent plate 21 is connected to the support 20 to achieve stable installation of the vent plate 21. A support rod 22 is welded to the side of the support 20, and the support rod 22 supports the vent plate 21, which can improve the support capacity of the vent plate 21 and prevent the vent plate 21 from deforming due to the weight of fly ash.

[0032] In this embodiment, as Figure 1 As shown, several pneumatic valves 18 are installed on the lower surface of the outer shell 5. The pneumatic valves 18 automatically control the compressed air to enter the outer shell 5. When it is necessary to discharge the fly ash inside the storage tank 1, the pneumatic valves 18 open.

[0033] In this embodiment, as Figure 2 and Figure 3As shown, the manual valve includes a housing 6 and a screw 16 rotatably connected to the housing 6. A screw sleeve 23 is screwed onto the screw 16, and a valve plate 17 is fixedly connected to the screw sleeve 23. The valve plate 17 is slidably connected to the housing 6. The inspection cover 10 is located above the screw 16. A sleeve 24 is welded onto the screw 16, and a handle 15 is inserted into the sleeve 24. Ball heads 25 are screwed to both ends of the handle 15 to prevent the handle 15 from falling off. The handle 15 drives the screw 16 to rotate. The valve plate 17 is connected to the screw 16 through the screw sleeve 23, and the valve plate 17 is slidably connected to the housing 6. Therefore, the rotation of the screw 16 can control the translation of the valve plate 17, and the valve plate 17 can block the outlet of the housing 6.

[0034] In this embodiment, as Figure 2 and Figure 3 As shown, the clamping device includes a bolt 11, which passes through the housing 6 and is screwed to a nut 14. A spring 13 and a pressure rod 12 are sleeved on the bolt 11. The pressure rod 12 is located on the upper surface of the inspection cover 10. Tightening the bolt 11 compresses the spring 13, changing the pressure of the spring 13 on the pressure rod 12. The pressure rod 12 presses the inspection cover 10, which can prevent dust from entering the housing 6. Rotating the pressure rod 12 to misalign with the inspection cover 10 allows the inspection cover 10 to be opened quickly, and the screw 16 can be lubricated to reduce the rotational resistance of the screw 16.

[0035] Specifically, during use, the storage tank 1 can be fixed to a certain height on a concrete platform on the ground to facilitate the arrangement of the conveying chute 9, and the fly ash is sent into the storage tank 1 for storage.

[0036] Air supply pipe 3 is connected to a gas tank that stores compressed air. Opening the valve of the gas tank can send compressed air into air supply pipe 3.

[0037] When discharging fly ash, the first step is to send compressed air into the conveying chute 9 through a Roots blower. The Roots blower has a flow rate of 50 m3 / min and a pressure of 0.098 MPa, which is suitable for pneumatic conveying of the conveying chute 9. Depending on the conveying distance and the characteristics of fly ash, a Roots blower with a larger flow rate or higher pressure can be selected.

[0038] The second step is to open the manual valve and the pneumatic valve 18 in sequence. Both the manual valve and the pneumatic valve 18 are gate valves.

[0039] The third step involves introducing compressed air through the air supply pipe 3. The compressed air then flows through the air blowing pipe 4 into the storage tank 1, thus cleaning the inner wall of the storage tank 1.

[0040] Fourth step, the pneumatic valve 18 is opened and the rotor scale 8 is started. Compressed air enters the outer shell 5 and passes through the vent plate 21 and blows towards the fly ash. Then all the compressed air is discharged from the bottom of the storage tank 1. Compressed air can improve the fluidity of fly ash.

[0041] Fly ash flows into rotor scale 8 through manual valve and pneumatic valve 18. Rotor scale 8 is a Siemens brand, model WMB100. Rotor scale 8 has a maximum weighing capacity of 1000kg and an accuracy of ±0.5%. It is suitable for the accurate measurement of fly ash. Depending on the actual weighing range and accuracy requirements, other brands or models of rotor scales can be selected.

[0042] The rotor scale 8 calculates the discharge volume of fly ash and sends the fly ash into the conveying chute 9. After compressed air is introduced into the conveying chute 9, the fly ash is sent into the grinding head for grinding.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cement grinding fly ash batching system, characterized in that, include: Storage tank (1), the lower end of the storage tank (1) is equipped with a shell (5), the middle part of the shell (5) is equipped with a discharge pipe (19), the inside of the shell (5) is equipped with an inclined vent plate (21), the vent plate (21) is connected to the upper end of the discharge pipe (19); The manual valve is connected to the feed pipe (19), the outlet of the manual valve is connected to the automatic valve (7), the outlet of the automatic valve (7) is connected to the rotor scale (8), and the inspection cover (10) of the manual valve is connected to the manual valve through a clamp. A conveying chute (9) is connected to the outlet of the rotor scale (8), and the inclination angle of the conveying chute (9) is 4-10 degrees.

2. The cement grinding fly ash batching system according to claim 1, characterized in that: The storage tank (1) has several annularly arranged air blowing pipes (4) installed on the lower part of its surface, and the air blowing pipes (4) are connected to air supply pipes (3).

3. The cement grinding fly ash batching system according to claim 1, characterized in that: The inner wall of the outer shell (5) is welded with a support (20), and the vent plate (21) is connected to the support (20).

4. A cement grinding fly ash batching system according to claim 3, characterized in that: The support (20) has a support rod (22) welded to its side, and the support rod (22) supports the ventilated plate (21).

5. A cement grinding fly ash batching system according to claim 1, characterized in that: Several pneumatic valves (18) are installed on the lower surface of the outer casing (5).

6. A cement grinding fly ash batching system according to claim 1, characterized in that: The manual valve includes a housing (6) and a screw (16) rotatably connected to the housing (6). A screw sleeve (23) is screwed onto the screw (16). A valve plate (17) is fixedly connected to the screw sleeve (23). The valve plate (17) is slidably connected to the housing (6). The inspection cover (10) is located above the screw (16).

7. A cement grinding fly ash batching system according to claim 6, characterized in that: The clamping device includes a bolt (11), which passes through the housing (6) and is screwed with a nut (14). A spring (13) and a pressure rod (12) are sleeved on the bolt (11), and the pressure rod (12) is located on the upper surface of the inspection cover (10).

8. A cement grinding fly ash batching system according to claim 6, characterized in that: The screw (16) is welded with a sleeve (24), and a handle (15) is inserted into the sleeve (24). Ball heads (25) are screwed to both ends of the handle (15).

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