Anti-scabbing device for stirring shaft of mixing tank for high-tower compound fertilizer production

Abstract

The utility model belongs to an anti-scabbing device for a stirring shaft of a mixing tank for high-tower compound fertilizer production. Comprising a middle mixing tank unit applied to a high-tower compound fertilizer production system, one side of a middle stirring shaft at the upper part in a mixing tank in the mixing tank unit is provided with a urea water flushing nozzle with the urea water temperature of 90-130 DEG C, and the urea water flushing nozzle is connected with a urea water preparation unit; the urea water preparation unit is at least internally provided with a urea water quantitative detection piece for determining the amount of urea; the device has the advantages that the process design is reasonable, and the labor intensity can be reduced, the cleaning efficiency can be improved and water resources and heat energy can be saved while the defects of large potential safety hazard and easiness in damaging the stirring shaft in the traditional technology are overcome.

Description

Technical Field

[0001] The utility model belongs to the field of high tower compound fertilizer production, and particularly relates to an anti - scarring device for the stirring shaft of a mixing tank used in high tower compound fertilizer production. Background Technique

[0002] During the production process of high tower compound fertilizer, nitrogen, phosphorus, and potassium fertilizers are sent to the tower for pulping treatment. The pulping equipment consists of a storage tank and a stirring component to form a mixing tank. After the raw materials enter the mixing tank, they are melted at high temperature, stirred and mixed, and then sent to the granulation section. At present, the mixing tank of the high tower compound fertilizer pulping equipment has the following problems: when the liquid - phase raw materials enter the mixing tank and impact the liquid surface or stir the molten liquid raw materials, the splashes generated will adhere to the stirring shaft. For the part of the stirring shaft above the liquid level, irregular large scar blocks will be formed with the continuous adhesion of the splashes. These scar blocks not only increase the radial load on the stirring shaft, affecting the stable operation of the equipment, but also affect the addition of raw materials in the subsequent process. To overcome the above defects, workers need to use a long cleaning shovel to clean the rotating shaft manually, and the scarring needs to be cleaned at least once an hour. This cleaning process has great potential safety hazards, not only causing the defects of high labor intensity and low cleaning efficiency of workers, but also easily damaging the stirring shaft during the cleaning process, thus affecting its service life. Content of the Utility Model

[0003] The utility model provides an anti - scarring device for the stirring shaft of a mixing tank used in high tower compound fertilizer production to solve the technical problems mentioned in the above background technique.

[0004] The technical solution of the utility model is as follows:

[0005] An anti - scarring device for the stirring shaft of a mixing tank used in high tower compound fertilizer production includes a mixing tank unit applied to the high tower compound fertilizer production system. On one side of the stirring shaft in the upper part of the mixing tank in the mixing tank unit, there is a urea water flushing nozzle with a urea flushing water temperature of 90°C - 130°C, and the urea water flushing nozzle is connected to a urea water preparation unit; at least a urea water quantitative detection part for determining the amount of urea is provided in the urea water preparation unit.

[0006] The beneficial effects of the present utility model are as follows: In traditional technologies, the scar treatment of the stirring shaft generally adopts the method of using a cleaning shovel, rather than the form of flushing; mainly because the conventional flushing uses normal-temperature flushing water, which will cause a sharp increase in the heat load in the high tower compound fertilizer production system, resulting in a large consumption of steam energy (in the high tower compound fertilizer production system, the mixing tank needs the materials to maintain a certain temperature and a certain concentration); while the present utility model uses urea flushing water at a certain temperature as the flushing medium, and utilizes the moisture and heat inside the urea water to dilute and melt the scar blocks and make them fall off naturally to achieve the purpose of removing the scar blocks; at the same time, a urea water quantitative detection component is set to determine the content of urea in the urea flushing water to ensure the quality of the final compound fertilizer product. Through the above settings, the defects of large safety hazards and easy damage to the stirring shaft in traditional technologies can be overcome, and at the same time, the characteristics of reducing labor intensity and improving cleaning efficiency can be achieved.

[0007] Preferably, the urea water preparation unit includes a urea water storage tank, a stirring member is arranged inside the urea water storage tank, a heat exchange coil is arranged outside the urea water storage tank, and a storage tank cover member capable of opening and closing is arranged at the top of the urea water storage tank; the urea water quantitative detection component includes a urea concentration on-line detector arranged at the lower part inside the urea water storage tank and a flow meter arranged between the urea water storage tank and the urea water flushing nozzle.

[0008] Preferably, the head end of the heat exchange coil is connected to the steam pipeline through a steam solenoid valve, and the tail end of the heat exchange coil is connected to the inside of the urea water storage tank through a steam trap group.

[0009] Preferably, a temperature sensor is arranged at the lower part inside the urea water storage tank.

[0010] Preferably, the storage tank cover member includes a fixed storage tank cover and an opening and closing storage tank cover. The area of the fixed storage tank cover is larger than that of the opening and closing storage tank cover. The fixed storage tank cover is connected to the opening and closing storage tank cover through a hinge; a stirring member is arranged on the fixed storage tank cover. The stirring member includes a stirring motor arranged on the fixed storage tank cover. The main shaft of the stirring motor extends into the urea water storage tank, and a stirring blade is sleeved on the lower part of the main shaft inside the urea water storage tank.

[0011] Preferably, a urea water transfer pump is arranged between the urea water storage tank and the flow meter.

[0012] Preferably, the mixing tank in the mixing tank unit includes a melting tank, a primary mixing tank and a secondary mixing tank.

[0013] Preferably, the urea water flushing nozzles in the melting tank, the primary mixing tank and the secondary mixing tank are respectively connected to the urea water preparation unit through their corresponding urea water solenoid valves.

[0014] Preferably, the urea water flushing nozzle is arranged 150 mm below the cover of the mixing tank and 50 mm away from the side of the stirring shaft.

[0015] A mixing tank stirring shaft anti-scaling device for high tower compound fertilizer production made according to the above technical solution. The utility model abandons the direct cleaning method using a cleaning shovel in the traditional technology, and uses urea water with a temperature of 90°C - 130°C as the cleaning medium. The moisture and heat inside the urea water are used to dilute and melt the scale blocks and make them fall off naturally to achieve the purpose of removing the scale blocks. At the same time, it can also monitor the urea content in the urea flushing water to ensure the quality of the compound fertilizer. Further, by setting the heat exchange coil, the utility model can not only heat the urea water in the urea water storage tank, but also use the condensed water after heat exchange as a raw material to dissolve urea, so as to save the water for urea dissolution, improve the urea dissolution efficiency and utilize the heat of the aforementioned condensed liquid. It has the advantages of reasonable process design, solving the defects of large safety hazards and easy damage to the stirring shaft in the traditional technology, reducing labor intensity, improving cleaning efficiency, and saving water resources and heat energy. Brief Description of the Drawings

[0016] Figure 1 is a structural schematic diagram of the utility model;

[0017] Figure 2 is a structural schematic diagram of the storage tank cover part of the utility model;

[0018] Figure 3 is a schematic diagram of the positional relationship between the stirring shaft and the urea water flushing nozzle of the utility model.

[0019] Reference numerals in the figure: 1, stirring shaft; 2, urea water flushing nozzle; 3, urea water storage tank; 4, heat exchange coil; 5, online urea concentration detector; 6, flowmeter; 7, steam solenoid valve; 8, steam pipeline; 9, steam trap group; 10, temperature sensor; 11, fixed storage tank cover; 12, opening and closing storage tank cover; 13, hinge; 14, stirring motor; 15, stirring blade; 16, urea water transfer pump; 17, melting tank; 18, primary mixing tank; 19, secondary mixing tank; 20, urea water solenoid valve. Detailed Description of the Embodiment

[0020] In order to enable those skilled in the art to better understand the technical solution of the utility model, the following describes the utility model in detail with reference to the drawings. The description of this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the utility model.

[0021] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] It should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0023] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] Such as Figures 1-3As shown in the figure, the utility model is an anti-scaling device for the stirring shaft of a mixing tank used in the production of high-tower compound fertilizers, including a mixing tank unit applied to the high-tower compound fertilizer production system. On one side of the stirring shaft 1 in the upper part of the mixing tank in the mixing tank unit, there is a urea water flushing nozzle 2 with a urea flushing water temperature of 90°C - 130°C, and the urea water flushing nozzle 2 is connected to the urea water preparation unit; at least a urea water quantitative detection component for determining the amount of urea is provided in the urea water preparation unit. The utility model innovatively uses urea water with a temperature of 90°C - 130°C as the flushing water medium, and uses the moisture and heat inside the urea water to dilute and melt the scale block and make it fall off naturally; thus avoiding the safety hazards caused by manually using a cleaning shovel to remove scale from the rotating stirring shaft; specifically, when the temperature of the urea water is less than 90°C, it will cause fluctuations in the production temperature of compound fertilizers, thus affecting the stability of the compound fertilizer production system and the quality of compound fertilizer products; when the temperature of the urea water is greater than 130°C, a large amount of biuret will be generated, thus affecting the quality of compound fertilizer products; further, while using urea water as the flushing water, the utility model detects the amount of urea through the urea water quantitative detection component, so that the urea content in the compound fertilizer product meets the corresponding product standards.

[0026] Further, the urea water preparation unit includes a urea water storage tank 3, a stirring member is provided inside the urea water storage tank 3, a heat exchange coil 4 is provided outside the urea water storage tank 3, and a storage tank cover member that can be opened and closed is provided at the top of the urea water storage tank 3; the urea water quantitative detection component includes a urea concentration on-line detector 5 provided at the lower part inside the urea water storage tank 3, and a flow meter 6 provided between the urea water storage tank 3 and the urea water flushing nozzle 2. In the utility model, the urea water preparation unit can realize the preparation of urea water by setting the urea water storage tank 3, and the heat exchange coil 4 is used to heat the urea water to reach the threshold of the target temperature while promoting the dissolution of urea; by setting the storage tank cover member that can be opened and closed, the purpose of facilitating the addition of materials can be realized (for example: adding urea particles or desalted water, etc.), by setting the urea concentration on-line detector 5, the concentration of urea water can be detected, preferably, the concentration of the urea water in the utility model is 20%; by setting the flow meter 6, the amount of urea water entering the mixing tank unit can be detected, so as to determine the amount of urea entering the high-tower compound fertilizer production system to meet the characteristics of the quality of compound fertilizer products.

[0027] Further, the first end of the heat exchange coil 4 is connected to the steam pipeline 8 through a steam solenoid valve 7, and the end of the heat exchange coil 4 is connected to the inside of the urea water storage tank 3 through a steam trap group 9. Through the above settings, the heat of the steam in the steam pipeline 8, the heat of the condensed water, and the condensed water itself can be effectively utilized to achieve the characteristic of energy conservation.

[0028] Further, a temperature sensor 10 is provided at the lower inner part of the urea water storage tank 3. By setting the temperature sensor 10, real-time monitoring of the urea water temperature can be achieved to meet the requirements for it to be used as the flushing water of the present utility model.

[0029] Further, the storage tank cover member includes a fixed storage tank cover 11 and an opening / closing storage tank cover 12. The area of the fixed storage tank cover 11 is larger than that of the opening / closing storage tank cover 12. The fixed storage tank cover 11 is connected to the opening / closing storage tank cover 12 through a hinge 13. A stirring member is provided on the fixed storage tank cover 11. The stirring member includes a stirring motor 14 provided on the fixed storage tank cover 11. The main shaft of the stirring motor 14 extends into the urea water storage tank 3. A stirring blade 15 is sleeved on the lower part of the main shaft in the urea water storage tank 3. Through the above settings, an installation position can be provided for the stirring member, and at the same time, it is convenient to add materials.

[0030] Further, a urea water transfer pump 16 is provided between the urea water storage tank 3 and the flow meter 6. By setting the urea water transfer pump 16, the purpose of facilitating the transfer of urea water can be achieved.

[0031] Further, the mixing tank in the mixing tank unit includes a melting tank 17, a primary mixing tank 18, and a secondary mixing tank 19. The present utility model is mainly applied to a tower compound fertilizer production system. The melting tank 17, the primary mixing tank 18, and the secondary mixing tank 19 in the tower compound fertilizer production system are all applicable to the technical solution of the present utility model.

[0032] Further, the urea water flushing nozzles 2 in the melting tank 17, the primary mixing tank 18, and the secondary mixing tank 19 are respectively connected to the urea water preparation unit through their respective corresponding urea water solenoid valves 20.

[0033] Further, the urea water flushing nozzle 2 is arranged 150 mm below the tank cover of the mixing tank and 50 mm away from the side of the stirring shaft 1.

[0034] The working principle of the present utility model is as follows: Weigh solid urea and demineralized water externally. After weighing, open the opening and closing storage tank cover 12, and put the solid urea and demineralized water into the urea water storage tank 3; Start the stirring motor 14, so that the main shaft of the stirring motor 14 drives the stirring blades 15 to rotate to realize the stirring of the materials and accelerate the dissolution of solid urea particles; At the same time, the steam in the steam pipeline 8 enters the heat exchange coil 4 through the steam solenoid valve 7 to heat the materials in the urea water storage tank 3, and the condensed liquid after heat exchange enters the urea water storage tank 3 through the steam trap group 9 for use as raw materials and heat sources; The aforementioned solid urea and water form urea water with a concentration of 20%, and the water includes the comprehensive demineralized water added in the opening and closing storage tank cover 12 and the condensed liquid; Under the combined action of stirring and heating, it can accelerate the dissolution of urea particles and keep the temperature of the urea water between 90°C and 130°C; The concentration and temperature of the aforementioned urea water can be detected by the on-line urea concentration detector 5 and the temperature sensor 10; The control of the concentration and temperature of the urea water can be in manual control or automatic control mode. For example, when the temperature is too high, the opening of the steam solenoid valve 7 can be adjusted smaller, and when the temperature is too low, the opening of the steam solenoid valve 7 can be adjusted larger; When the concentration is too high, the steam trap group 9 can be opened, etc.; The flushing timing in each of the melting tank 17, the first-stage mixing tank 18, and the second-stage mixing tank 19 is to be opened once every 0.5h - 1h, the duration of each opening is 5min, and the flow rate is 100L / h; Further, the urea water flushing nozzle 2 in the present utility model is a duckbill type flushing nozzle, which is arranged 150mm below the tank cover of the mixing tank and 50mm away from the side of the stirring shaft 1. When in use, the urea water flushing nozzle 2 evenly sprays the urea flushing water on the stirring shaft 1, and flows down along the stirring shaft 1 of the urea water to the material scaling position. The moisture and heat inside the urea flushing water are used to dilute and melt the scale blocks, and then they fall off naturally to realize the automatic cleaning of the scaling on the stirring shaft 1. By setting the heat exchange coil, the present utility model can not only heat the urea water in the urea water storage tank, but also use the condensed water after heat exchange as raw materials to dissolve urea, so as to achieve the purpose of saving water for urea dissolution, improving the urea dissolution efficiency and utilizing the heat of the aforementioned condensed liquid; It has the characteristics of reasonable process design, being able to reduce labor intensity, improve cleaning efficiency, and save water resources and heat energy while solving the defects of large potential safety hazards and easy damage to the stirring shaft in the traditional technology.

[0035] The standard parts used in this application document can all be purchased from the market, and can also be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in this field. Moreover, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail in this utility model. And the peripheral controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and this peripheral controller is a conventional known device.

[0036] It should be noted that in this article, the term "comprise", "include" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0037] In this article, specific examples are used to elaborate on the principle and implementation manner of this utility model. The description of the above examples is only used to help understand the method and its core idea of this utility model. The above are only the preferred implementation manners of this utility model. It should be pointed out that due to the limited nature of written expression and objectively there are infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of this utility model, several improvements, modifications or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, changes or combinations, or directly applying the concept and technical solution of the utility model to other occasions without improvement, should all be regarded as the protection scope of this utility model.

Claims

1. A device for preventing coking on the stirring shaft of a mixing tank used in the production of high-tower compound fertilizers, including a mixing tank unit in the high-tower compound fertilizer production system, characterized in that: On one side of the stirring shaft (1) in the upper part inside the mixing tank of the mixing tank unit, there is a urea water flushing nozzle (2) with the temperature of urea flushing water being 90°C - 130°C, and the urea water flushing nozzle (2) is connected to the urea water preparation unit; In the urea water preparation unit, there is at least a urea water quantitative detection component for determining the amount of urea.

2. The anti-scaling device for the stirring shaft of the mixing tank used in the production of high tower compound fertilizer according to claim 1, characterized in that: The urea water preparation unit includes a urea water storage tank (3), inside which there is a stirring component, outside which there is a heat exchange coil (4), and on the top of the urea water storage tank (3), there is a storage tank cover component that can be opened and closed; The urea water quantitative detection component includes a urea concentration online detector (5) arranged at the lower part inside the urea water storage tank (3), and a flow meter (6) arranged between the urea water storage tank (3) and the urea water flushing nozzle (2).

3. The anti-scaling device for the stirring shaft of the mixing tank used in the production of high-tower compound fertilizer according to claim 2, characterized in that: The first end of the heat exchange coil (4) is connected to a steam pipeline (8) through a steam solenoid valve (7), and the last end of the heat exchange coil (4) is connected to the inside of the urea water storage tank (3) through a steam trap group (9).

4. The anti-scaling device for the stirring shaft of the mixing tank used in the production of high-tower compound fertilizer according to claim 3, wherein: At the lower part inside the urea water storage tank (3), there is a temperature sensor (10).

5. The anti-scaling device for the stirring shaft of the mixing tank used in the production of high tower compound fertilizer according to claim 2, characterized in that: The storage tank cover component includes a fixed storage tank cover (11) and an opening / closing storage tank cover (12), the area of the fixed storage tank cover (11) is larger than that of the opening / closing storage tank cover (12), and the fixed storage tank cover (11) is connected to the opening / closing storage tank cover (12) through a hinge (13); On the fixed storage tank cover (11), there is a stirring component, which includes a stirring motor (14) arranged on the fixed storage tank cover (11), the main shaft of the stirring motor (14) extends into the urea water storage tank (3), and a stirring blade (15) is sleeved on the lower part of the main shaft inside the urea water storage tank (3).

6. The anti-scaling device for the stirring shaft of the mixing tank used in the production of high tower compound fertilizer according to claim 2, characterized in that: Between the urea water storage tank (3) and the flow meter (6), there is a urea water transfer pump (16).

7. A device for preventing scar formation on the stirring shaft of a mixing tank for producing high tower compound fertilizer according to any one of claims 1-6, characterized in that: The mixing tank in the mixing tank unit includes a melting tank (17), a primary mixing tank (18), and a secondary mixing tank (19).

8. The anti-scaling device for the stirring shaft of the mixing tank used in the production of high tower compound fertilizer according to claim 7, characterized in that: The urea water flushing nozzles (2) in the melting tank (17), the primary mixing tank (18), and the secondary mixing tank (19) are respectively connected to the urea water preparation unit through their corresponding urea water solenoid valves (20).

9. The anti-scaling device for the stirring shaft of the mixing tank used in the production of high tower compound fertilizer according to claim 8, characterized in that: The urea water flushing nozzle (2) is arranged 150 mm below the tank cover of the mixing tank and 50 mm away from the side of the stirring shaft (1).

Images