Energy-saving device on urea production line

Abstract

The utility model relates to the technical field of urea production lines, and discloses an energy-saving device on a urea production line, which comprises a mixing drum and a support frame, a second motor is mounted at the bottom of the mixing drum, the output end of the second motor is in transmission connection with a transmission disc, and the bottom of a connecting rod is connected to an upper stirring disc below. Flow guide holes are formed in the upper and lower stirring discs. The first motor is mounted in the middle of the top of the mixing barrel, and the upper stirring disc and the lower stirring disc are connected through the connecting rod, so that the upper stirring disc and the lower stirring disc can be driven to rotate after the first motor works, and the conical block is fixed at the top of the solid area of the lower stirring disc; the conical block can improve the flow guide effect on liquid, so that the flowing effect is improved under the design of the flow guide holes of the upper stirring disc and the lower stirring disc, the overall uniform mixing effect is improved, meanwhile, the conical design of the conical block also facilitates the liquid to be converged to the external flow guide holes, and discharging from the discharging cylinder at the bottom position is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of urea production line technology, specifically to an energy-saving device for a urea production line. Background Technology

[0002] A urea production line is an industrial production line used to produce urea. The main raw materials for urea are liquid ammonia and carbon dioxide. Liquid ammonia can be obtained from natural gas or coal, while carbon dioxide usually comes from natural gas combustion or as a byproduct of coal chemical industry. The main production method for urea is the aqueous solution full-cycle method. The raw materials, liquid ammonia and carbon dioxide, need to be pretreated to ensure that they are free of oil and impurities.

[0003] For example, CN214182668U proposes an energy-saving device for producing automotive urea solution. This device heats the liquid inside the mixing drum by heating the heating coil held in a heating clamp. The upper and lower stirring components can create convection in the liquid, increasing the mixing speed with urea and reducing the mixing time. However, even with the use of two sets of stirring components, there is a tendency for dead zones to exist in the middle. Combined with the fluidity of the liquid, the horizontal design of the lower stirring component can easily affect the smoothness of the discharge from below. Utility Model Content

[0004] The purpose of this utility model is to provide an energy-saving device for a urea production line, in order to solve the problem mentioned in the background art that, even when two sets of stirring components are used, there is a dead zone in the middle position during use, and combined with the fluidity of the liquid, the horizontal stirring component design at the bottom can easily affect the smoothness of the discharge from the bottom.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving device for a urea production line, comprising a mixing drum and a support frame. A second motor is installed at the bottom of the mixing drum, and a transmission disc is driven to the output end of the second motor. A lower stirring disc is fixed to the top of the transmission disc, and the center of the lower stirring disc is a solid area. A guide hole is opened in the outer direction of the lower stirring disc. A conical block is fixed at the top of the solid area of ​​the lower stirring disc. A first motor is installed at the middle position of the top of the mixing drum, and an upper stirring disc is driven to the output end of the first motor via a coupling. A connecting rod is fixedly connected to the bottom of the upper stirring disc, and the bottom of the connecting rod is connected to the lower upper stirring disc. Guide holes are opened inside both the upper and lower stirring discs.

[0006] As a further technical solution of this utility model, the central area inside the upper mixing plate is a solid plate, and the upper and lower positions of the connecting rod are respectively connected to the solid plates inside the upper and lower mixing plates.

[0007] As a further technical solution of this utility model, temperature sensors are installed on both sides of the inner wall of the mixing cylinder, and a control panel is installed on the front end of the mixing cylinder.

[0008] As a further technical solution of this utility model, an exhaust pipe is connected to one side of the top of the mixing cylinder, and a feed cylinder is connected to the other side of the top of the mixing cylinder.

[0009] As a further technical solution of this utility model, a water inlet cylinder is connected and installed at the upper left side of the mixing cylinder, and a discharge cylinder is connected and installed on both sides of the bottom of the mixing cylinder.

[0010] As a further technical solution of this utility model, the mixing cylinder is wrapped with an outer protective cotton, and a groove is provided on the inner wall of the outer protective cotton. A heating coil is arranged in the groove, and a connector is fixed on the side of the outer protective cotton.

[0011] As a further technical solution of this utility model, the inner wall of the outer protective cotton is coated with a heat-resistant adhesive layer at the upper and lower positions of the groove. The outer protective cotton is bonded and fixed to the outer wall of the mixing cylinder by the heat-resistant adhesive layer, and the heating coil is disc-shaped and surrounded inside the groove.

[0012] As a further technical solution of this utility model, the bottom of the mixing cylinder is covered with a protective cover located outside the second motor, and mounting plates are welded and fixed on both sides of the protective cover near the upper position.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the energy-saving device on the urea production line not only improves the mixing and discharging effect, but also improves the heating effect and protection capability of the energy-saving device.

[0014] A first motor is installed at the middle of the top of the mixing drum, connecting the upper and lower mixing discs via a connecting rod. When the first motor operates, it drives the two upper mixing discs to rotate, thus extending the upper mixing area. Simultaneously, a second motor is installed at the bottom of the mixing drum. When the second motor operates, it drives the transmission disc to rotate. The lower mixing disc at the top of the transmission disc rotates synchronously with it. The center of the lower mixing disc is a solid area, and a conical block is fixed at the top of this solid area. This conical block improves the liquid's flow guidance effect. Combined with the design of the flow guide holes in the upper and lower mixing discs, this enhances the flow effect and improves the overall mixing effect. The conical design of the block also facilitates the liquid's flow to the external flow guide holes, making it easier to discharge from the bottom discharge cylinder.

[0015] By placing the outer protective cotton on the outside of the mixing cylinder and creating a groove in the outer protective cotton to accommodate the heating coil in an annular shape, and coating the inner wall of the outer protective cotton with a heat-resistant adhesive layer in the direction above and below the groove, the uniform heating effect is improved after connecting the power supply using the connector.

[0016] The second motor is mounted at the bottom of the mixing drum, and the protective cover covers the outside of the second motor. The protective cover has a space for accommodating the second motor. During assembly, the mounting plates on both sides of the protective cover are used for connection and assembly. Heat dissipation holes are opened in the bottom of the protective cover for heat dissipation. In this way, the second motor below can be protected during operation, thereby improving the overall protection capability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a top view cross-sectional structural diagram of the external insulation cotton of this utility model;

[0019] Figure 3 This is a schematic diagram of the front half-section structure of the external insulation cotton of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the protective cover of this utility model;

[0021] In the diagram: 1. Mixing cylinder; 2. First motor; 3. Feed cylinder; 4. Upper mixing plate; 5. Temperature sensor; 6. Cone block; 7. Lower mixing plate; 8. Protective cover; 9. Transmission plate; 10. Second motor; 11. Discharge cylinder; 12. Support frame; 13. Outer protective cotton; 14. Connecting rod; 15. Water inlet cylinder; 16. Exhaust pipe; 17. Groove; 18. Heating coil; 19. Connector; 20. Heat-resistant adhesive layer; 21. Mounting plate. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4An embodiment of this utility model provides an energy-saving device for a urea production line, comprising a mixing drum 1 and a support frame 12. A second motor 10 is installed at the bottom of the mixing drum 1, and a transmission disc 9 is driven to the output end of the second motor 10. A lower stirring disc 7 is fixed to the top of the transmission disc 9. The center of the lower stirring disc 7 is a solid area, and a guide hole is opened in the outer direction inside the lower stirring disc 7. A conical block 6 is fixed to the top of the solid area of ​​the lower stirring disc 7. A first motor 2 is installed at the middle position of the top of the mixing drum 1, and an upper stirring disc 4 is driven to the output end of the first motor 2 via a coupling. A connecting rod 14 is fixedly connected to the bottom of the upper stirring disc 4, and the bottom of the connecting rod 14 is connected to the lower upper stirring disc 4. Guide holes are opened inside both the upper and lower stirring discs 4.

[0024] The central area inside the upper mixing plate 4 is a solid plate, and the upper and lower positions of the connecting rod 14 are respectively connected to the solid plates inside the upper and lower mixing plates 4.

[0025] Temperature sensors 5 are installed on both sides of the inner wall of the mixing cylinder 1, and a control panel is installed on the front end of the mixing cylinder 1.

[0026] An exhaust pipe 16 is connected to one side of the top of the mixing cylinder 1, and a feed cylinder 3 is connected to the other side of the top of the mixing cylinder 1.

[0027] A water inlet cylinder 15 is connected and installed on the upper left side of the mixing cylinder 1, and discharge cylinders 11 are connected and installed on both sides of the bottom of the mixing cylinder 1.

[0028] The mixing cylinder 1 is wrapped with an outer protective cotton 13. A groove 17 is provided on the inner wall of the outer protective cotton 13. A heating coil 18 is installed in the groove 17. A connector 19 is fixed to the side of the outer protective cotton 13.

[0029] The inner wall of the outer protective cotton 13 is coated with a heat-resistant adhesive layer 20 at the upper and lower positions of the groove 17. The outer protective cotton 13 is bonded and fixed to the outer wall of the mixing cylinder 1 by the heat-resistant adhesive layer 20. The heating coil 18 is disc-shaped and surrounded inside the groove 17.

[0030] The bottom of the mixing drum 1 is covered by a protective cover 8 located outside the second motor 10. Mounting plates 21 are welded and fixed on both sides of the upper part of the protective cover 8.

[0031] Furthermore, a control panel is installed on the front end of the mixing cylinder 1. The control panel is not covered by the outer protective cotton 13, or the control panel can be installed on the side of the support frame 12. In combination with the existing technology, the control panel is equipped with necessary processing chips, PLC control units, etc., for the purpose of receiving the monitoring signal from the temperature sensor 5, processing and displaying it, and also for operating the motor to start and stop.

[0032] Furthermore, by combining existing technologies, necessary valves are installed in each feed cylinder 3, discharge cylinder 11 and other pipelines to prevent backflow and control the opening and closing of the flow rate;

[0033] Furthermore, the PLC control units and the like involved are all physical functional modules that combine existing computer software programs or protocols with the hardware carrier of this application. The computer software programs involved in these physical functional modules are themselves technologies known to those skilled in the art.

[0034] Working principle: First, the protective cover 8 covers the outside of the second motor 10. The protective cover 8 has a space to accommodate the second motor 10. During assembly, the mounting pieces 21 on both sides of the protective cover 8 are used for connection and assembly. Heat dissipation holes are opened in the bottom of the protective cover 8 to protect the second motor 10 below. The upper and lower stirring plates 4 are connected by the connecting rod 14. The first motor 2 is started to drive the upper and lower stirring plates 4 to rotate, thereby extending the upper stirring area. The second motor 10 is started to drive the transmission plate 9 to rotate. At this time, the lower stirring plate 7 on the top of the transmission plate 9 rotates synchronously with it. The center of the lower stirring plate 7 is a solid area. A conical block 6 is fixed at the top of the solid area of ​​the lower stirring plate 7. With the design of the guide holes of the upper stirring plate 4 and the lower stirring plate 7, the flow effect is improved. At the same time, the conical design of the block 6 allows the liquid to flow to the external guide hole, so that the material can be discharged from the bottom discharge cylinder 11.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. An energy saving device on a urea production line, comprising a mixing cylinder (1), a support frame (12), characterized in that: A second motor (10) is installed at the bottom of the mixing cylinder (1). The output end of the second motor (10) is connected to a transmission disk (9). A lower stirring disk (7) is fixed at the top of the transmission disk (9). The center of the lower stirring disk (7) is a solid area. A guide hole is opened in the outer direction of the lower stirring disk (7). A cone-shaped block (6) is fixed at the top of the solid area of ​​the lower stirring disk (7). A first motor (2) is installed at the middle position of the top of the mixing cylinder (1). The output end of the first motor (2) is connected to an upper stirring disk (4) by a coupling. A connecting rod (14) is fixedly connected to the bottom of the upper stirring disk (4). The bottom of the connecting rod (14) is connected to the lower upper stirring disk (4). Guide holes are opened inside both the upper and lower stirring disks (4).

2. A device for saving energy in a urea production line according to claim 1, characterized in that: The central area inside the upper mixing plate (4) is a solid plate, and the upper and lower positions of the connecting rod (14) are respectively connected to the solid plates inside the upper and lower mixing plates (4).

3. A device for saving energy in a urea production line according to claim 1, characterized in that: Temperature sensors (5) are installed on both sides of the inner wall of the mixing cylinder (1), and a control panel is installed on the front end of the mixing cylinder (1).

4. A device for saving energy in a urea production line according to claim 1, characterized in that: An exhaust pipe (16) is connected to one side of the top of the mixing cylinder (1), and a feed cylinder (3) is connected to the other side of the top of the mixing cylinder (1).

5. An energy-saving device for a urea production line according to claim 1, characterized in that: A water inlet cylinder (15) is connected and installed on the upper left side of the mixing cylinder (1), and a discharge cylinder (11) is connected and installed on both sides of the bottom of the mixing cylinder (1).

6. A device for saving energy in a urea production line according to claim 1, characterized in that: The mixing cylinder (1) is wrapped with an outer protective cotton (13). A groove (17) is provided on the inner wall of the outer protective cotton (13). A heating coil (18) is provided in the groove (17). A connector (19) is fixed on the side of the outer protective cotton (13).

7. A device for saving energy in a urea production line according to claim 6, characterized in that: The inner wall of the outer protective cotton (13) is coated with a heat-resistant adhesive layer (20) at the upper and lower positions of the groove (17). The outer protective cotton (13) is bonded and fixed to the outer wall of the mixing cylinder (1) by the heat-resistant adhesive layer (20). The heating coil (18) is disc-shaped and surrounded inside the groove (17).

8. A device for saving energy in a urea production line according to claim 1, characterized in that: The bottom of the mixing cylinder (1) is covered by a protective cover (8) located outside the second motor (10), and mounting plates (21) are welded and fixed on both sides of the upper part of the protective cover (8).

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