Compound fertilizer high-tower cooling machine with drying function
By installing an air dehumidification and heat exchange unit and a sliding closed door in the high-tower cooling machine for compound fertilizer, the heat of steam condensate is used to dehumidify the air and dry the compound fertilizer, solving the problem of material moisture absorption and adhesion during high-temperature and high-humidity seasons, and achieving quality assurance and energy saving of compound fertilizer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN XINLIANXIN FERTILIZER
- Filing Date
- 2025-03-04
- Publication Date
- 2026-04-21
AI Technical Summary
In existing compound fertilizer high-tower coolers, during hot and humid seasons, the materials are prone to absorbing moisture and sticking together during the cooling process, leading to clumping, which affects product quality and increases production costs.
An air dehumidification and heat exchange unit is installed in the cooler. The heat of steam condensate is used to dehumidify the air, and the dehumidified air is used to dry the compound fertilizer. Combined with a sliding closed door and temperature and humidity sensors to control the air volume, the drying function can be realized in a high humidity environment.
In high-humidity environments, compound fertilizer quality is ensured, clumping is avoided, moisture content is reduced, crop utilization is improved, and heat energy is reused to reduce production costs.
Smart Images
Figure CN224151264U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of compound fertilizer production technology, specifically a high-tower cooling machine for compound fertilizer with drying function. Background Technology
[0002] The main production steps of the high-tower compound fertilizer process include: solid raw material conveying, raw material melting and mixing, granulation, drum cooling, screening, powder flow cooling, coating, and packaging. In the drum cooling step, due to the characteristics of the high-tower production process, the finished material has a very low moisture content but a high temperature, typically around 60-70℃. Therefore, the material is continuously turned over inside the cooling drum by lifting plates, allowing a large amount of ambient cold air to exchange heat with the product particles, thus cooling the product. The current production process uses natural ventilation. In hot and humid seasons, the product passing through the cooler only has a cooling function and cannot effectively solve the problem of high humidity in summer. When the air temperature and humidity are high, the hot and humid ambient air exchanges heat with the product particles during the cooling process. Especially for highly hygroscopic materials such as urea-based fertilizers and nitro-based fertilizers, problems such as sticking and melting due to moisture absorption can easily occur. This can lead to clumping in subsequent screening processes and during finished product storage, reducing product quality and increasing the production cost of high-tower compound fertilizer. Utility Model Content
[0003] To overcome the above deficiencies, this utility model provides a high-tower cooling machine for compound fertilizer with drying function, so as to solve the technical problems existing in the prior art.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A compound fertilizer high-tower cooler with drying function includes a cooler. The upper part of the feed end of the cooler is provided with a compound fertilizer feed port connected to the outlet of the compound fertilizer high-tower granulator. The bottom of the discharge end of the cooler is provided with a compound fertilizer discharge port. The discharge end of the cooler is connected to an air dehumidification and heat exchange unit. The gas phase outlet at the upper part of the feed end of the cooler is connected to a gas phase exhaust pipe through a bag filter.
[0006] The beneficial effects of this utility model are as follows: This utility model is a modification of the existing high-tower cooling machine for compound fertilizer, so as to achieve cooling of compound fertilizer in non-high humidity environment and drying of compound fertilizer in high humidity environment, thereby ensuring the quality of compound fertilizer products; Specifically, when in a non-high humidity environment, the cooling machine can cool the compound fertilizer in the traditional way; when in a high humidity environment, the air dehumidification and heat exchange unit can be activated to dry the air. By drying the air, its moisture content can be reduced, and the dried air can be used to dry the compound fertilizer, thereby reducing the moisture content of the compound fertilizer and ensuring its quality.
[0007] Preferably, the air dehumidification heat exchange unit includes an air dehumidification heat exchanger, which includes a first channel connected to the atmosphere, the end of which is connected to the discharge end of the cooler; the inlet of the second channel is connected to the outlet of the steam condensate pipe in the compound fertilizer high-tower granulation system, and the outlet of the second channel is connected to the condensate pipe.
[0008] Preferably, the air dehumidification and heat exchange unit further includes a third channel, the inlet of which is connected to a 0.8MPa steam network, the outlet of which is connected to an insulated pipe located outside the bag filter, and the outlet of the insulated pipe is connected to a condensate pipe.
[0009] Preferably, an exhaust fan is provided between the bag filter and the gas phase exhaust pipe.
[0010] Preferably, the discharge end of the cooler is provided with a sliding closed door in the middle, and a hot air inlet is provided on the corresponding end face of the discharge end of the cooler above the sliding closed door.
[0011] Preferably, a hot air blower is provided between the hot air inlet and the end of the first channel, and the hot air blower is connected to a motor with a frequency converter.
[0012] Preferably, the frequency converter is connected to the control terminal of the controller, and the signal terminal of the controller is connected to a temperature and humidity sensor installed inside the cooler.
[0013] Preferably, the sliding closed door is provided with a handle.
[0014] A compound fertilizer high-tower cooler with drying function, manufactured according to the above technical solution, improves the operating rate of the cooler while ensuring the quality of the compound fertilizer by modifying the existing cooler. Specifically, in a non-high humidity environment, the cooler is used to cool the fertilizer from the compound fertilizer high-tower granulator. In a high humidity environment, an air dehumidification heat exchange unit capable of drying the air is activated to dehumidify the air, and the dehumidified air is then used to dry the compound fertilizer, thereby reducing the moisture content of the compound fertilizer and ensuring its quality. This utility model utilizes the air dehumidification heat exchange unit to dry the compound fertilizer from the high-tower granulator. The steam condensate in the tower granulation system achieves heat energy reuse. Simultaneously, the heat-exchanged medium enters the insulated pipes outside the bag filter to insulate the bag filter, thus ensuring its long-term stable operation. Furthermore, this invention features a sliding closed door to prevent the entry of high-humidity external air and the escape of dry internal gas in high-humidity environments. Moreover, this invention includes a frequency converter, controller, and temperature and humidity sensors, enabling effective control of the airflow entering the cooler based on air humidity and temperature, thereby reducing operational difficulty while ensuring the quality of the compound fertilizer. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the end face structure of the discharge end of the cooler of this utility model.
[0018] In the diagram: 1. Air dehumidifier heat exchanger; 2. Hot air blower; 3. Cooler; 4. Bag filter; 5. Exhaust fan; 6. Steam condensate pipe outlet; 7. 0.8MPa steam network; 8. Compound fertilizer high-tower granulator; 9. Condensate pipe; 10. Compound fertilizer inlet; 11. Compound fertilizer outlet; 12. Sliding door; 13. Temperature and humidity sensor; 14. Controller; 15. Frequency converter; 16. Motor; 17. Gas phase exhaust pipe; 18. Insulated pipe; 19. Hot air inlet; 20. Handle; 21. First channel; 22. Second channel; 23. Third channel. Detailed Implementation
[0019] 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 scope of protection of the present utility model.
[0020] The following is in conjunction with the appendix Figure 1-2To further describe this application in detail, this utility model is a compound fertilizer high-tower cooler with drying function, including a cooler 3. The upper part of the feed end of the cooler 3 is provided with a compound fertilizer feed port 10 connected to the outlet of the compound fertilizer high-tower granulator 8. The bottom of the discharge end of the cooler 3 is provided with a compound fertilizer discharge port 11. The discharge end of the cooler 3 is connected to an air dehumidification and heat exchange unit. The gas phase outlet at the upper part of the feed end of the cooler 3 is connected to a gas phase exhaust pipe 17 through a bag filter dust collector 4. This invention modifies the existing cooler 3 to ensure the quality of compound fertilizer and improve the cooler's operating rate. By setting up an air dehumidification and heat exchange unit, the air entering the cooler 3 can be dehumidified to avoid subsequent fertilizer clumping, thus ensuring the quality of compound fertilizer even in high-humidity environments. Simultaneously, the cooler 3 can also cool the compound fertilizer normally in non-high-humidity environments. The air dehumidification and heat exchange unit described in this invention can be a heater or heat exchanger, heating and drying the air through heating or heat exchange. Heating can be achieved using electricity, coal, fuel oil, or biomass fuel, etc. Heat exchange can be achieved using conventional methods such as steam heat exchange or thermal oil heat exchange.
[0021] Furthermore, the air dehumidification heat exchange unit includes an air dehumidification heat exchanger 1, which includes a first channel 21 connected to the atmosphere, the end of which is connected to the discharge end of the cooler 3; the inlet of the second channel 22 is connected to the outlet 6 of the steam condensate pipe in the high-tower granulation system of compound fertilizer, and the outlet of the second channel 22 is connected to the condensate pipe 9. The condensate in the high-tower granulation system of compound fertilizer in this invention can come from the steam condensate generated by equipment such as the dissolving tank, primary mixing tank, and secondary mixing tank on the tower during the production process, which require steam heating and insulation. The condensate in the high-tower granulation system of compound fertilizer is generally directly sent to the demineralized water station in the ammonia production unit for digestion and utilization, and its heat energy cannot be fully utilized. This invention, by setting up the air dehumidification heat exchanger 1, utilizes the heat of the condensate to dry the ambient air, thereby saving energy. The air dehumidification heat exchanger 1 in this invention is preferably a tube-fin structure, with the tubes made of stainless steel and the fins made of aluminum, to improve heat exchange efficiency.
[0022] Furthermore, the air dehumidification and heat exchange unit also includes a third channel 23. The inlet of the third channel 23 is connected to the 0.8MPa steam network 7, and the outlet of the third channel 23 is connected to the insulated pipe 18 located outside the bag filter 4. The outlet of the insulated pipe 18 is connected to the condensate pipe 9. To achieve sufficient air dehumidification, this invention uses 0.8MPa steam to simultaneously dry the high-humidity ambient air, achieving thorough dehumidification and drying of the humid air. Simultaneously, the condensate generated by the 0.8MPa steam enters the insulated pipe 18 to insulate the bag filter 4, thereby utilizing the waste heat of the condensate and ensuring the long-term stable operation of the bag filter 4. Preferably, this invention employs a segmented air drying method, such as using condensate from the compound fertilizer high-tower granulation system to preheat the air, followed by thorough heating and drying with 0.8MPa steam; this reduces the moisture content in the air and ensures a uniform temperature.
[0023] Furthermore, a tail gas fan 5 is provided between the bag filter 4 and the gas phase exhaust pipe 17. By setting the tail gas fan 5, the bag filter 4 can be kept in a negative pressure state, thereby improving the dust removal effect.
[0024] Furthermore, a sliding closed door 12 is provided in the middle of the discharge end of the cooler 3, and a hot air inlet 19 is provided on the corresponding end face of the discharge end of the cooler 3 above the sliding closed door 12. Traditional coolers 3 have an open end face at the discharge end to facilitate the entry of ambient air. This invention, however, provides a sliding closed door 12. When the cooler 3 is normally cooling the compound fertilizer, the sliding closed door 12 can be opened; when the cooler 3 is drying the compound fertilizer, the sliding closed door 12 is closed. This avoids air convection inside and outside the cooler 3 during the drying process, which could affect the drying quality of the compound fertilizer, and also achieves energy saving. The sliding closed door 12 can be installed at the original opening position of the discharge end of the cooler 3. A track is set at the opening position, and the sliding closed door 12 is installed on the track. The sliding closed door 12 can be a single leaf or a double-leaf opening.
[0025] Furthermore, a hot air blower 2 is provided between the hot air inlet 19 and the end of the first channel 21, and the hot air blower 2 is connected to a motor 16 with a frequency converter 15. This utility model can adjust the frequency of the motor 16 by setting the frequency converter 15, thereby controlling the amount of dry air sent into the cooler 3 by the hot air blower 2.
[0026] Furthermore, the frequency converter 15 is connected to the control terminal of the controller 14, and the signal terminal of the controller 14 is connected to the temperature and humidity sensor 13 installed inside the cooler 3. This invention uses the temperature and humidity sensor 13 to monitor the temperature and humidity inside the cooler 3 in real time, and uses the monitored data to control the amount of dry air delivered into the cooler 3 by the hot air blower 2, thus achieving convenient control.
[0027] Furthermore, the sliding closed door 12 is provided with a handle 20. The handle 20 facilitates the opening and closing of the sliding closed door 12.
[0028] The specific working process of this utility model is as follows: the condensate in the compound fertilizer high-tower granulation system and the steam in the 0.8MPa steam network 7 enter the corresponding second channel 22 and third channel 23 in the air dehumidification heat exchanger 1, respectively; the ambient cold air enters the first channel 21 in the air dehumidification heat exchanger 1, and the ambient cold air is heated to about 50°C by the condensate in the compound fertilizer high-tower granulation system, and then heated to 100°C by the 0.8MPa steam; at the same time, the compound fertilizer produced by the compound fertilizer high-tower granulator 8 enters the cooler 3 through the compound fertilizer inlet 10, and is then cooled by the cooler 3. The feed end of the air flows towards the discharge end of the cooler 3 and enters the subsequent process section through the compound fertilizer discharge port 11. After heat exchange and dehumidification, the air enters through the discharge end of the cooler 3 and comes into reverse contact with the compound fertilizer to achieve drying. The dried waste heat air is then filtered by the bag filter 4 and sent by the exhaust fan 5 into the gas phase exhaust pipe 17 for discharge into the atmosphere. The condensate after heat exchange in the second channel 22 directly enters the condensate pipe 9 for recycling. The condensate after heat exchange in the third channel 23 enters the insulation pipe 18 to insulate the bag filter 4. The wastewater then enters the condensate pipe 9 for recycling. The above process occurs under high humidity conditions, during which the sliding closed door 12 is closed. In non-high humidity conditions, the sliding closed door 12 is opened, and the compound fertilizer produced by the compound fertilizer high-tower granulator 8 enters the cooler 3 through the compound fertilizer inlet 10. The fertilizer then travels from the inlet to the outlet of the cooler 3 and exits through the compound fertilizer discharge port 11 into the subsequent processing section. External air enters through the open sliding closed door 12, and the waste heat air is filtered by the bag filter 4 before exiting through the exhaust gas. The blower 5 delivers gas into the exhaust pipe 17 and discharges it into the atmosphere. This invention is particularly suitable for southern my country, specifically the hot and humid environment. In practical use, when the temperature and humidity sensor 13 detects that the temperature inside the cooler 3 is greater than 25°C and the humidity is greater than 60% (the above temperature and humidity are equal to the ambient temperature and humidity before operation), it will transmit the corresponding signal to the controller 14. The controller 14 will process these signals and feed them back to the frequency converter 15. By utilizing the speed regulation function of the frequency converter 15 on the motor 16, a significant amount of energy can be saved by applying it to the blower. The frequency converter 15 automatically increases or decreases the input power of the motor 16 based on changes in ambient temperature and humidity, thereby adjusting the speed of the hot air blower 2, saving energy while ensuring the drying effect. This invention utilizes the air dehumidification heat exchanger 1 and the hot air blower 2, and modifies the cooler 3 to achieve the dual purpose of cooling and drying. By using temperature and humidity sensors, frequency converters, and other equipment, the airflow of the hot air blower is automatically controlled according to changes in environmental factors, reducing energy consumption. This not only solves the problem of finished material clumping during high temperature and high humidity seasons, improving product quality, but also fully recovers and utilizes the heat of the steam condensate from the high tower for insulation in the bag filter, reducing the production cost of high tower compound fertilizer.
[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A compound fertilizer high tower cooler with drying function, comprising a cooler (3), a compound fertilizer feeding port (10) connected with an outlet of a compound fertilizer high tower granulator (8) is arranged at the upper part of the feeding end of the cooler (3), and a compound fertilizer discharge port (11) is arranged at the bottom of the discharge end of the cooler (3), characterized in that: The discharge end of the cooler (3) is connected to the air dehumidification and heat exchange unit, and the gas phase outlet at the upper part of the feed end of the cooler (3) is connected to the gas phase discharge pipe (17) through the bag filter (4).
2. The compound fertilizer high-tower cooler with drying function according to claim 1, characterized in that: The air dehumidification and heat exchange unit includes an air dehumidification heat exchanger (1), which includes a first channel (21) connected to the atmosphere. The end of the first channel (21) is connected to the discharge end of the cooler (3). The inlet of the second channel (22) is connected to the outlet (6) of the steam condensate pipe in the compound fertilizer high tower granulation system, and the outlet of the second channel (22) is connected to the condensate pipe (9).
3. The compound fertilizer high-tower cooler with drying function according to claim 2, characterized in that: The air dehumidification and heat exchange unit also includes a third channel (23). The inlet of the third channel (23) is connected to the 0.8MPa steam network (7), and the outlet of the third channel (23) is connected to the heat-insulating pipe (18) set outside the bag filter (4). The outlet of the heat-insulating pipe (18) is connected to the condensate pipe (9).
4. The compound fertilizer high-tower cooler with drying function according to claim 1, characterized in that: A tail gas fan (5) is provided between the bag filter (4) and the gas phase exhaust pipe (17).
5. The compound fertilizer high-tower cooler with drying function according to claim 2, characterized in that: The cooler (3) has a push-pull closed door (12) in the middle of the discharge end, and a hot air inlet (19) is provided on the upper part of the corresponding end face of the cooler (3) discharge end.
6. The compound fertilizer high-tower cooling machine with drying function according to claim 5, characterized in that: A hot air blower (2) is provided between the hot air inlet (19) and the end of the first channel (21), and the hot air blower (2) is connected to a motor (16) with a frequency converter (15).
7. The compound fertilizer high-tower cooler with drying function according to claim 6, characterized in that: The frequency converter (15) is connected to the control terminal of the controller (14), and the signal terminal of the controller (14) is connected to the temperature and humidity sensor (13) installed inside the cooler (3).
8. The compound fertilizer high-tower cooler with drying function according to claim 5, characterized in that: The sliding closed door (12) is equipped with a handle (20).