Metering type lime nitrogen conveying device

Abstract

The utility model relates to a metering type lime nitrogen conveying device which comprises a support, a material storage bin, a spiral metering scale and a pneumatic conveying assembly are arranged on the support, the material storage bin is located above the spiral metering scale, a discharging port of the material storage bin is connected with a feeding port of the spiral metering scale through a first flexible connector, a sieve plate is fixedly arranged in the material storage bin, and the pneumatic conveying assembly is connected with the spiral metering scale through a second flexible connector. A feeding hole of the storage bin is positioned above the sieve plate; a grinding mechanism is rotationally connected to the center of the top surface of the sieve plate; the pneumatic conveying assembly comprises an air pump and an air pipe, the air pipe is located below the spiral metering scale, the air pump is connected with an air inlet of the air pipe, a feeding pipe is fixedly connected to the outer wall of the air pipe, and a discharging port of the spiral metering scale is connected with the feeding pipe through a second flexible connector. According to the lime nitrogen conveying device, lime nitrogen cakes can be crushed before conveying, so that the lime nitrogen is conveyed more smoothly, the conveying efficiency is higher, and the reaction efficiency is higher after the lime nitrogen enters reaction equipment.

Description

Technical Field

[0001] This utility model relates to the field of cyanamide production technology, and in particular to calcium cyanamide technology, specifically a metering calcium cyanamide conveying device. Background Technology

[0002] Monocyanamide, as a raw material for organic synthesis and a pharmaceutical intermediate, is mainly used in the production of cytarabine hydrochloride, cyanuramide, etc. Calcium cyanide is the main raw material for the production of monocyanamide. In the production of monocyanamide, calcium cyanide is first fed into the reaction equipment through a feeding device to participate in the reaction and generate an aqueous solution of monocyanamide, which is then evaporated to obtain the finished monocyanamide product.

[0003] Patent CN207209416U discloses a calcium cyanamide material pneumatic conveying device, which uses an air supply device to deliver calcium cyanamide to a silo. However, this patent uses only one air duct to deliver the airflow, and the intensity and velocity of the airflow in the duct are constant, resulting in poor conveying efficiency for calcium cyanamide. Furthermore, due to the inherent characteristics of calcium cyanamide, the raw material is prone to caking, and this patent does not address caking, making it even more difficult to convey caking calcium cyanamide by airflow. This can easily lead to blockage of the discharge pipe, and when caking raw materials participate in reactions, the reactions are more likely to be slow or incomplete, affecting product quality. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a metering calcium cyanide conveying device. Before conveying, the device can crush any clumps of calcium cyanide, making the conveying process smoother and more efficient. Once the calcium cyanide enters the reaction equipment, the reaction efficiency is faster and higher.

[0005] This utility model is achieved through the following technical solution: a metering lime cyanide conveying device includes a support frame, on which a storage bin, a screw metering scale, and a pneumatic conveying assembly are mounted. The storage bin is located above the screw metering scale, and the outlet of the storage bin is connected to the inlet of the screw metering scale via a first flexible connection. A sieve plate is fixed inside the storage bin, and the inlet of the storage bin is located above the sieve plate. A grinding mechanism is rotatably connected to the center of the top surface of the sieve plate. The pneumatic conveying assembly includes an air pump and an air duct. The air duct is located below the screw metering scale, and the air pump is connected to the air inlet of the air duct. A feed pipe is fixed to the outer wall of the air duct, and the outlet of the screw metering scale is connected to the feed pipe via a second flexible connection.

[0006] In this system, calcium cyanamide is added to the storage silo through the inlet. Clumps of calcium cyanamide are sieved out using a screen plate. A grinding mechanism then crushes the clumps sieved out from the top of the screen plate, ensuring smooth delivery of the calcium cyanamide, preventing pipe blockage, and allowing for complete reaction to guarantee production quality. The calcium cyanamide in the storage silo is metered and pumped into the air duct by a screw metering pump. An air pump then pneumatically delivers the calcium cyanamide to the reaction equipment to participate in the reaction.

[0007] As an optimization, the grinding mechanism includes a rotating shaft, a grinding cutter, and a drive motor. The drive motor is fixed to the top of the storage hopper. The lower end of the rotating shaft is rotatably connected to the center of the screen plate, and the upper end of the rotating shaft passes through the storage hopper and is connected to the output end of the drive motor. The grinding cutter is located on the top surface of the screen plate and is fixedly connected to the rotating shaft. This optimized solution drives the rotating shaft to rotate via the drive motor, thereby driving the grinding cutter to rotate and achieving the crushing of agglomerates on the top surface of the screen plate.

[0008] As an optimization, an electrically controlled valve is connected between the discharge port of the storage silo and the first flexible connection. This optimized solution controls the discharge of material from the storage silo through the electrically controlled valve.

[0009] As an optimization, a level gauge is installed inside the storage silo. This optimization facilitates the monitoring of the material level within the storage silo.

[0010] As an optimization, a star-shaped discharge valve is connected between the second flexible connection and the feed pipe. In this optimized scheme, the calcium nitric acid output by the spiral metering pump can be uniformly and stably discharged into the air duct through the star-shaped discharge valve.

[0011] As an optimization, the duct includes an inlet section, a venturi tube, and an outlet section connected sequentially along the axial direction. The diameter of the inlet section is larger than that of the outlet section, and the feed pipe is connected to the outlet section. In this optimized scheme, the airflow enters from the inlet section, passes through the metered airflow flow rate of the venturi tube, and exits from the outlet section. Because the diameter of the inlet section is larger than that of the outlet section, the airflow is accelerated by the Venturi effect, increasing the airflow intensity. This allows the airflow to carry the calcium nitric acid into the reaction equipment for rapid diffusion, improving the delivery efficiency of the calcium nitric acid and the reaction efficiency.

[0012] The beneficial effects of this utility model are as follows: when calcium cyanamide enters the storage silo, the clumps of calcium cyanamide are screened out by the sieve plate, and the clumps screened out by the grinding mechanism are crushed, so that the calcium cyanamide can be transported smoothly, avoiding blockage of the pipeline, and allowing the calcium cyanamide to react fully, thus ensuring production quality.

[0013] The calcium cyanide in the storage silo is metered by a screw metering pump and then transported to the air duct. This allows for accurate metering and control of the amount of calcium cyanide used, improving production precision and making it easy to use.

[0014] The airflow provided by the air pump enters the duct and is accelerated by the Venturi effect, which increases the airflow intensity and causes the airflow to carry the calcium nitric acid into the reaction equipment for rapid diffusion, thereby improving the delivery efficiency of calcium nitric acid and the reaction efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the storage silo;

[0017] As shown in the figure:

[0018] 1. Support frame, 2. Screw metering pump, 3. Storage silo, 4. Electrically controlled valve, 5. First flexible connection, 6. Second flexible connection, 7. Star-shaped discharge valve, 8. Feed pipe, 9. Air duct, 91. Air inlet section, 92. Venturi tube, 93. Air outlet section, 10. Air pump, 11. Control box, 12. Drive motor, 13. Rotary shaft, 14. Grinding and cutting blade, 15. Screen plate, 16. Level gauge. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0020] like Figures 1-2 As shown, a metering lime cyanide conveying device includes a support 1, on which a storage bin 3, a screw metering scale 2 and a pneumatic conveying assembly are mounted.

[0021] The storage silo 3 is located above the screw weighing scale 2, and the outlet of the storage silo 3 is connected to the inlet of the screw weighing scale 2 via a first flexible connection 5. In this embodiment, both the storage silo 3 and the screw weighing scale 2 are fixedly connected to the support 1. The inlet and outlet of the storage silo 3 are located at the top and bottom of the storage silo 3, respectively, and the outlet of the storage silo 3 and the inlet of the screw weighing scale 2 are arranged vertically opposite each other to facilitate the connection and installation of the first flexible connection 5. In this embodiment, an electrically controlled valve 4 is connected between the outlet of the storage silo 3 and the first flexible connection 5 to facilitate the control of the discharge of the storage silo 3.

[0022] A sieve plate 15 is fixedly installed inside the storage bin 3. The feed inlet of the storage bin 3 is located above the sieve plate 15, and a grinding mechanism is rotatably connected to the center of the top surface of the sieve plate 15. In this embodiment, the outer diameter of the sieve plate 15 is adapted to the inner diameter of the storage bin 3. The sieve plate 15 divides the inner cavity of the storage bin 3 into upper and lower parts, and the distance between the sieve plate 15 and the top of the storage bin 3 is 5-8 cm, thus providing both grinding space and sufficient storage space.

[0023] In this way, the calcium nitrogen entering from the feed inlet of the storage silo 3 is screened through the sieve plate 15. The calcium nitrogen clumps that are screened out remain on the sieve plate 15. Only after the clumps are crushed and qualified by the grinding mechanism can they fall off the sieve plate 15. This ensures that the calcium nitrogen is of qualified size and can be smoothly conveyed, avoiding pipeline blockage and allowing the calcium nitrogen to react fully, thus ensuring production quality.

[0024] Specifically, the grinding mechanism includes a rotating shaft 13, grinding cutters 14, and a drive motor 12. The drive motor 12 is fixed to the top of the storage hopper 3. The lower end of the rotating shaft 13 is rotatably connected to the center of the sieve plate 15, and the upper end of the rotating shaft 13 passes through the top of the storage hopper 3 and is connected to the output end of the drive motor 12. The grinding cutters 14 are located on the top surface of the sieve plate 15 and are fixed to the rotating shaft 13. In this embodiment, two grinding cutters 14 are symmetrically fixed to the rotating shaft 13 to improve the crushing efficiency. The rotating shaft 13 is driven to rotate by the drive motor 12, thereby driving the grinding cutters 14 to rotate and crushing the calcium cyanamide agglomerates on the top surface of the sieve plate 15.

[0025] Preferably, a level gauge 16 is installed in the storage bin 3. In this embodiment, the level gauge 16 is located below the sieve plate 15, and the level gauge makes it easy to know the amount of material in the storage bin.

[0026] The pneumatic conveying assembly includes an air pump 10 and an air duct 9. The air duct 9 is located below the spiral weighing scale 2. The air pump 10 is connected to the air inlet of the air duct 9. A feeding pipe 8 is fixed to the outer wall of the air duct 9. The discharge port of the spiral weighing scale 2 is connected to the feeding pipe 8 through a second flexible connection 6.

[0027] Specifically, the air pump 10 is fixedly connected to the bracket 1. The air duct 9 includes an inlet section 91, a venturi tube 92, and an outlet section 93 connected sequentially along the axial direction. The diameter of the inlet section 91 is larger than that of the outlet section 93. The inlet section 91 is connected to the inlet section of the venturi tube 92, and the outlet section 93 is connected to the diffuser section of the venturi tube 92. The feed pipe 8 is connected to the outlet section 93. In this embodiment, the air duct 9 is arranged horizontally along the axial direction, and the feed pipe 8 is arranged vertically and connected to the middle of the outlet section 93. The outlet of the spiral metering pump 2 is arranged vertically opposite to the feed pipe 8, thereby facilitating the installation and connection of the second flexible connection 6. In this embodiment, a star-shaped discharge valve 7 is connected between the second flexible connection 6 and the feed pipe 8. The star-shaped discharge valve 7 is fixedly connected to the bracket 1, and the lime nitrogen output by the spiral metering pump 2 can be uniformly and stably discharged into the outlet section 93 through the star-shaped discharge valve 7.

[0028] The airflow supplied by the air pump 10 enters through the inlet duct section 91, passes through the Venturi tube 92 to measure the airflow flow, and then exits through the outlet duct section 93. The Venturi effect of the airflow passing through the Venturi tube accelerates the flow, increasing the airflow intensity and causing the airflow to carry the calcium nitric acid into the reaction equipment for rapid diffusion, thereby improving the efficiency of calcium nitric acid delivery and reaction efficiency.

[0029] In this embodiment, the support 1 is also equipped with a control box 11, which contains a control processor. The drive motor 12, the electric control valve 4, the spiral metering pump 2, the star-shaped unloading valve 7, and the air pump 10 are all electrically connected to the control processor to realize automatic metering and control of the delivery of lime cyanide.

[0030] In operation, the calcium cyanamide raw material is fed into the storage silo 3 through the inlet. The silo cyanamide lumps are sieved out by the sieve plate 15. The drive motor 12 drives the rotating shaft 13, causing the grinding cutter 14 to rotate and crush the lumps until they fall off. The control processor controls the opening of the electronically controlled valve 4, simultaneously activating the screw metering pump 2, the rotary valve 7, and the air pump 10. The screw metering pump 2 meter and delivers the calcium cyanamide to the rotary valve 7, which then discharges it evenly and stably into the air duct 9. Simultaneously, the air pump 10 blows the calcium cyanamide from the air duct 9 into the reaction equipment to participate in the reaction. When the delivery volume reaches the set value, the control processor stops the screw metering pump 2 and the rotary valve 7, completing the metering and delivery of the calcium cyanamide.

[0031] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A metered lime nitrogen delivery device comprising a holder (1), characterised in that: The support (1) is provided with a storage bin (3), a spiral metering scale (2) and a pneumatic conveying assembly, the storage bin (3) is located above the spiral metering scale (2), the discharge port of the storage bin (3) is connected with the feeding port of the spiral metering scale (2) through a first flexible connection (5), a sieve plate (15) is fixedly arranged in the storage bin (3), the feeding port of the storage bin (3) is located above the sieve plate (15), and the top surface of the sieve plate (15) is rotationally connected with a grinding mechanism; The pneumatic conveying assembly comprises an air pump (10) and an air pipe (9), the air pipe (9) is located below the spiral metering scale (2), the air pump (10) is connected with the air inlet of the air pipe (9), and a feeding pipe (8) is fixedly connected to the outer wall of the air pipe (9); the discharge port of the spiral metering scale (2) is connected with the feeding pipe (8) through a second flexible connection (6).

2. The metered lime nitrogen delivery device of claim 1, wherein: The grinding mechanism comprises a rotating shaft (13), a grinding cutter (14) and a driving motor (12), the driving motor (12) is fixedly arranged on the top of the storage bin (3), the lower end of the rotating shaft (13) is rotationally connected with the center of the sieve plate (15), the upper end of the rotating shaft (13) penetrates through the storage bin (3) and is transmissionally connected with the output end of the driving motor (12), and the grinding cutter (14) is located on the top surface of the sieve plate (15) and is fixedly connected with the rotating shaft (13).

3. The metered lime nitrogen delivery device of claim 1, wherein: An electric control valve (4) is arranged between the discharge port of the storage bin (3) and the first flexible connection (5).

4. The metered lime nitrogen delivery device of claim 1, wherein: A material level meter (16) is arranged in the storage bin (3).

5. The metered lime nitrogen delivery device of claim 1, wherein: A star-shaped discharge valve (7) is arranged between the second flexible connection (6) and the feeding pipe (8).

6. The metered lime nitrogen delivery device of claim 1, wherein: The air pipe (9) comprises an air inlet pipe section (91), a Venturi pipe (92) and an air outlet pipe section (93) which are connected in sequence along the axial direction, the pipe diameter of the air inlet pipe section (91) is greater than that of the air outlet pipe section (93), and the feeding pipe (8) is connected with the air outlet pipe section (93).

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