Vertical mill powder concentrator blanking device capable of uniformly scattering materials

Abstract

The utility model belongs to the technical field of cement processing equipment, and particularly relates to a vertical mill powder concentrator blanking device capable of uniformly scattering materials, which comprises a blanking component and a scattering part, the blanking component comprises a material pipe joint and a plurality of blanking pipes, the upper end part of the material pipe joint is arranged below a material return ash hopper of a powder concentrator, the lower end part of the material pipe joint is provided with a plurality of discharge ports, and the scattering part is arranged on the blanking pipe joint. The plurality of blanking pipes are vertically arranged, the upper ends of the blanking pipes are respectively connected with the discharge port of the material pipe joint, the lower ends of the blanking pipes are respectively provided with a scattering piece, the plurality of scattering pieces are respectively arranged towards the grinding roller, and the distance from the outlet end of each scattering piece to the grinding roller is 1-1.5 m. According to the cement raw material scattering device, cement raw materials in the material returning ash hopper are uniformly conveyed through the discharging assembly, and then are directly scattered on the grinding roller through the material scattering pipe, so that the cement raw materials are uniformly scattered, the working efficiency of the grinding machine is improved, the supply of the raw materials is ensured, the energy consumption of a system is reduced, and the energy-saving effect is improved. Meanwhile, the enrichment time of the internal circulation material is shortened, the service life of equipment is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cement processing equipment, and in particular relates to a material discharge device of a vertical mill powder selector capable of evenly spreading materials. Background Art

[0002] In the existing technology, vertical mills are mostly used in the production of cement raw materials. The role of the vertical mill raw material system is to provide sufficient and high-quality raw materials for the clinker burning process to meet the production needs of the rotary kiln. At the same time, it can also make a difference in energy saving and consumption reduction of the system, providing a guarantee for high yield and low consumption in the cement clinker production process.

[0003] In the actual production process, the existing device has design defects, the material distribution is uneven, causing the material layer to change, affecting the working efficiency of the mill, and the material discharge port is high from the grinding area of ​​the grinding disc (about 4.5 meters). Some of the materials that fall in the internal circulation are blown up by the negative pressure for the second time and brought into the grinding chamber before they are ground again. This part of the raw material circulates and enriches in the mill for a long time, causing a large pressure difference in the mill, high resistance, affecting the ventilation in the mill, and increasing the load of the powder selector. At the same time, too much internal circulation material increases the wear of the wear-resistant parts in the mill, reduces the service life of spare parts, and increases maintenance costs. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a vertical mill powder classifier unloading device that can evenly spread materials, thereby achieving even spreading of cement raw materials, ensuring normal transportation and processing of materials, and improving production efficiency and product quality.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a feeding device for a vertical mill powder classifier that can evenly spread materials, including a feeding assembly and a spreading piece, the feeding assembly including a material pipe joint and a plurality of feeding pipes, the upper end of the material pipe joint is arranged below the return ash hopper of the powder classifier, and a plurality of discharge ports are arranged at the lower end, the plurality of feeding pipes are vertically arranged, the upper ends are respectively connected to the discharge ports of the material pipe joint, and the lower ends are all provided with spreading pieces, the plurality of spreading pieces are respectively arranged toward the grinding roller, and the distance from the outlet end of the spreading piece to the grinding roller is 1m~1.5m.

[0006] Preferably, the material pipe joint is arranged below the return ash hopper through a connecting flange, one end of the connecting flange is connected to the return ash hopper opening, and the other end is connected to the material receiving port of the material pipe joint.

[0007] Preferably, the number of discharge ports of the material pipe joint is adapted to the number of grinding rollers, and the number of feed pipes is adapted to the number of discharge ports of the material pipe joint.

[0008] Preferably, the diameters of the multiple feeding pipes are all 260 mm to 350 mm.

[0009] Preferably, an inspection door is also provided on the discharge pipe.

[0010] Preferably, the material spreading member is a material spreading pipe, which is arranged obliquely, with an inlet end of the material spreading pipe connected to the material discharge assembly and an outlet end arranged toward the grinding roller.

[0011] Preferably, a fixed bracket is further provided between the material discharge assembly and the inner wall of the powder classifier, one end of the fixed bracket is connected and fixed to the material discharge assembly, and the other end is connected and fixed to the inner wall of the powder classifier.

[0012] Compared with the prior art, the above technical solution has the following beneficial effects:

[0013] 1. Even material spreading: The utility model ensures that the cement raw material enters the grinding roller evenly through the design of the material discharging assembly and the material spreading piece, reducing the problem of material layer change that may be caused by uneven material distribution. This can improve the working efficiency of the mill and ensure the supply of high-quality raw materials.

[0014] 2. Reduce energy consumption: The utility model reduces the distance from the feeding port to the grinding area of ​​the grinding disc, and the falling materials in the internal circulation are less likely to be blown up by the negative pressure and brought into the grinding chamber, thereby reducing the pressure difference and resistance of the mill and improving the ventilation condition in the mill. This helps to reduce system energy consumption and improve energy-saving effects.

[0015] 3. Extend the life of equipment: By reducing the enrichment time of the internal circulation material and reducing the wear of the internal circulation material on the grinding chamber, the utility model can reduce the wear of wear-resistant parts, extend the service life of the mill and other wear-resistant parts, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a material discharge device of a vertical mill powder classifier capable of evenly spreading materials.

[0017] Among them: 1. Material pipe joint; 2. Feeding pipe; 3. Spreading pipe; 4. Grinding roller; 5. Inspection door; 6. Fixed bracket; 7. Connecting flange; 8. Powder selector; 9. Return ash hopper. DETAILED DESCRIPTION

[0018] Figure 1 It is the best embodiment of the utility model, and the following Figure 1 The utility model is further described.

[0019] like Figure 1As shown, the utility model is a feeding device for a vertical mill powder selector that can evenly spread materials, including a feeding assembly and a spreading pipe 3. The feeding assembly is vertically arranged below the return ash hopper 9 of the powder selector 8. The shape of the material receiving port of the feeding assembly is adapted to the shape of the return ash hopper 9. A plurality of discharge ports are arranged at the lower end of the feeding assembly, and the spreading pipe 3 is connected to the plurality of discharge ports. One end of the spreading pipe 3 is connected to the feeding assembly through a flange, and the other end is arranged toward the grinding roller 4. In this embodiment, the distance between the spreading pipe 3 and the grinding roller 4 is 1.5m, and the spreading pipe 3 can spread the material onto the grinding roller 4 for grinding and crushing. A fixed bracket 6 is also provided between the feeding assembly and the inner wall of the powder selector 8, one end of the fixed bracket 6 is connected and fixed to the feeding assembly, and the other end is connected and fixed to the inner wall of the powder selector 8, providing a more stable support for the entire feeding device.

[0020] Specifically, the feeding assembly includes a feed pipe joint 1 and a plurality of feed pipes 2. The feed pipe joint 1 is arranged below the return ash hopper 9 through a connecting flange 7. One end of the connecting flange 7 is connected to the return ash hopper 9, and the other end is connected to the feed port of the feed pipe joint 1. The feed pipe joint 1 has a plurality of discharge ports, and the number of discharge ports of the feed pipe joint 1 is adapted to the number of grinding rollers 4. The number of feed pipes 2 is adapted to the number of discharge ports of the feed pipe joint 1. In this embodiment, the number of grinding rollers 4 is three. Each feed pipe 2 is vertically connected to the feed port of the feed pipe joint 1 through a flange. The diameter of the feed pipe 2 is 300 mm to ensure sufficient flow. In order to facilitate inspection and maintenance, a spot inspection door 5 is also provided on the feed pipe 2. The spot inspection door 5 is welded on the feed pipe 2 so that the status of the feed pipe 2 can be checked at any time.

[0021] The working process of the utility model is as follows: the cement raw material enters the material discharging assembly from the return ash hopper 9, and is evenly transported to the material distributing pipe 3 through the connecting flange 7 and the material pipe joint 1 through multiple material discharging pipes 2. The material distributing pipe 3 then evenly spreads the cement raw material on the grinding roller 4 for grinding and crushing. The inspection door 5 facilitates the inspection and maintenance of the material discharging pipe 2.

[0022] The utility model realizes uniform spreading of cement raw materials. The cement raw materials in the return ash hopper 9 are uniformly transported to multiple feeding pipes 2 through the feeding assembly, and then spread on the grinding roller 4 through the spreading pipe 3 for further processing and treatment. The distance between the feeding port and the grinding area of ​​the grinding disc is reduced to 1.5 meters, and the materials falling in the internal circulation are less likely to be blown up by the negative pressure and brought into the grinding chamber, thereby reducing the pressure difference and resistance of the mill and improving the ventilation conditions in the mill. This helps to reduce system energy consumption and improve energy-saving effects. At the same time, the fixed bracket 6 ensures the stability of the feeding assembly, and the inspection door 5 facilitates the inspection and maintenance of the feeding pipe 2. The utility model realizes uniform spreading of cement raw materials, ensures the normal transportation and treatment of materials, improves production efficiency and product quality, and reduces costs.

[0023] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A feeding device for a vertical mill powder concentrator capable of evenly spreading materials, characterized in that: The invention comprises a material discharge component and a material spreading member, wherein the material discharge component comprises a material pipe joint (1) and a plurality of material discharge pipes (2), the upper end of the material pipe joint (1) is arranged below a return ash hopper (9) of a powder selector (8), and a plurality of material discharge ports are arranged at the lower end, the plurality of material discharge pipes (2) are arranged vertically, the upper ends are respectively connected to the material discharge ports of the material pipe joint (1), and the lower ends are all provided with material spreading members, the plurality of material spreading members are respectively arranged toward a grinding roller (4), and the distance between the outlet end of the material spreading member and the grinding roller (4) is 1 m to 1.5 m.

2. The material discharging device of a vertical mill classifier capable of evenly spreading materials according to claim 1 is characterized in that: The material pipe joint (1) is arranged below the return ash hopper (9) via a connecting flange (7); one end of the connecting flange (7) is connected to the opening of the return ash hopper (9), and the other end is connected to the material receiving opening of the material pipe joint (1).

3. The material discharging device of a vertical mill classifier capable of evenly spreading materials according to claim 1 is characterized in that: The number of discharge ports of the material pipe joint (1) is adapted to the number of grinding rollers (4), and the number of feed pipes (2) is adapted to the number of discharge ports of the material pipe joint (1).

4. The material discharging device of a vertical mill classifier capable of evenly spreading materials according to claim 1 is characterized in that: The diameters of the multiple feed pipes (2) are all between 260 mm and 350 mm.

5. The material discharging device of a vertical mill classifier capable of evenly spreading materials according to claim 1 is characterized in that: An inspection door (5) is also provided on the discharge pipe (2).

6. The material discharging device of a vertical mill classifier capable of evenly spreading materials according to claim 1 is characterized in that: The material spreading member is a material spreading pipe (3), the material spreading pipe (3) is arranged obliquely, the inlet end of the material spreading pipe (3) is connected to the material discharge assembly, and the outlet end is arranged toward the grinding roller (4).

7. The material discharging device of a vertical mill classifier capable of evenly spreading materials according to claim 1 is characterized in that: A fixed bracket (6) is also provided between the material discharge assembly and the inner wall of the powder classifier (8), one end of the fixed bracket (6) being connected and fixed to the material discharge assembly, and the other end being connected and fixed to the inner wall of the powder classifier (8).

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