Drying device
By using a drying method that combines direct contact with high-temperature hot air with rotating drum tumbling, the problem of difficult moisture removal and clumping of "white fertilizer" is solved, achieving a highly efficient and low-energy drying process while ensuring environmentally friendly emissions.
Patent Information
- Application Number
- CN202423310580.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing drying technologies are ineffective at removing moisture from "white fertilizer," which easily leads to clumping, high energy consumption, and environmental pollution.
The drying method employs direct contact of high-temperature hot air combined with rotating drum tumbling, and is equipped with an air heater and blower to improve thermal efficiency. It uses a cyclone separator and bag filter to treat exhaust gas, ensuring environmentally friendly emissions.
It significantly improves moisture removal efficiency, reduces clumping, lowers energy consumption, ensures environmentally friendly emissions, and meets modern environmental protection requirements.
Smart Images
Figure CN223691445U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of fertilizer drying, in particular to a drying device. BACKGROUND
[0002] At present, the drying technology of compound fertilizer mainly includes direct heating drying, indirect heating drying and combined drying and the like. Among them, the direct heating drying can quickly remove moisture by hot air generated by a hot air furnace, and is suitable for the drying process of most compound fertilizers. The indirect heating drying gradually diffuses the moisture inside the material outward through the heat conduction mode, and is suitable for materials sensitive to temperature or easy to be caked.
[0003] Although the existing drying technology is relatively mature, some problems still exist when processing some special raw materials. For example, "white fertilizer" is a compound fertilizer raw material made of filter residue generated by phosphate purification, which has complex composition and contains high iron, aluminum, calcium, magnesium and the like. Such raw material is prone to the following problems during the drying process:
[0004] Difficult to remove moisture: due to the high moisture content in "white fertilizer", the traditional drying method is difficult to effectively remove the moisture in a short time, which leads to product moisture exceeding the standard and affects the product quality.
[0005] Severe caking phenomenon: the complex chemical composition makes "white fertilizer" easy to be caked during the drying process, which not only increases the difficulty of subsequent processing, but also may cause equipment blockage and affect the production continuity.
[0006] High energy consumption: in order to achieve the ideal drying effect, the traditional drying device often needs high temperature and long time, which not only increases the energy consumption, but also may cause adverse effects on the physical properties of the material.
[0007] Environmental pollution: the waste gas and dust generated in the high-temperature drying process may cause environmental pollution if not properly treated, which does not meet the modern environmental protection requirements.
[0008] Therefore, the application provides a drying device which is easy to remove moisture, has small caking phenomenon, low energy consumption and no environmental pollution. CONTENT OF THE INVENTION
[0009] In order to overcome the shortcomings of the prior art, the application provides a drying device, which improves the heat efficiency, reduces the energy consumption, reduces the production cost, and effectively combines the cyclone separator and the bag-type dust collector, so as to ensure the cleanliness of the exhaust gas, meet the modern environmental protection requirements, and reduce the influence on the environment.
[0010] The technical scheme adopted by the application to solve the technical problems is:
[0011] A drying device comprises a drying granulator, a hot air pipe of the drying granulator is connected to a heating assembly, and an exhaust pipe of the drying granulator is connected to a dust collector.
[0012] A feed pipe of the drying granulator is connected to a concentrator, and a discharge pipe of the drying granulator is connected to a conveyor.
[0013] In some specific embodiments, the heating assembly comprises a hot blast stove connected to the hot air pipe of the drying granulator.
[0014] In some specific embodiments, the heating assembly further comprises an air heater connected to the hot blast stove and a blower connected to the air heater.
[0015] In some specific embodiments, a dehumidifier connected to the blower is further included.
[0016] In some specific embodiments, a cyclone separator connected to the exhaust pipe of the drying granulator at a feed end and connected to the dust collector at a discharge end is further included.
[0017] In some specific embodiments, the dust collector is a bag-type dust collector.
[0018] In some specific embodiments, the filter bag of the bag-type dust collector is made of Gore Membrane Polyester Needle Felt.
[0019] In some specific embodiments, the drying granulator comprises a rotating drum, a feed tank and a discharge tank arranged at two ends of the rotating drum respectively, and a nozzle arranged at a side of the feed tank away from the rotating drum.
[0020] In some specific embodiments, the feed tank comprises a feed tank body, a feed pipe and a hot air pipe, the feed pipe passes through the feed tank body and is arranged at a side of the feed tank body away from the rotating drum, and the other end of the feed pipe is arranged in the rotating drum.
[0021] The hot air pipe is fixedly connected to the feed tank body and arranged at a side of the feed tank body away from the rotating drum.
[0022] In some specific embodiments, the discharge tank comprises a discharge tank body, a discharge pipe and an exhaust pipe, the discharge pipe is arranged at a bottom of a tail end of the discharge tank body, and the exhaust pipe is arranged at a side of the discharge tank body away from the rotating drum.
[0023] The application has the following beneficial effects:
[0024] The drying device provided by the application, the hot blast stove generates high-temperature hot air, through the direct contact of the high-temperature hot air and the continuous tumbling in the rotary drum of the drying granulator, the contact area of the material and the hot air is improved, the moisture removal efficiency is significantly improved, and the problem of incomplete moisture removal in the traditional method is avoided.
[0025] The drying device provided by the application, the design of the rotary drum makes the material continuously tumble during the drying process, reduces the caking phenomenon of the material, and ensures the smooth progress of subsequent processing.
[0026] The drying device provided by the application, the air entering the hot blast stove is preheated by the air heater, the thermal efficiency is improved, and the energy consumption is reduced. At the same time, the cooperation of the air blower and the dehumidifier further improves the drying efficiency and reduces the energy consumption.
[0027] The drying device provided by the application, the combination of the cyclone separator and the bag-type dust collector effectively treats the waste gas and dust generated during the drying process, ensures that the discharged gas meets the environmental protection standard, and reduces the pollution to the environment. BRIEF DESCRIPTION OF DRAWINGS
[0028] The application will be further described below in combination with the drawings and examples.
[0029] Figure 1 is a structural schematic view of a drying device provided by the application;
[0030] Figure 2 is a structural schematic view of a drying granulator provided by the application;
[0031] Figure 3 is an enlarged view of position A in the drying device provided by the application. Figure 2
[0032] 1, drying granulator; 2, dust collector; 3, concentrator; 4, conveyor; 5, hot blast stove; 6, air heater; 7, air blower; 8, dehumidifier; 9, cyclone separator; 101, rotary drum; 102, feed box; 103, discharge box; 104, nozzle; 1021, feed box body; 1022, feed pipe; 1023, hot air pipe; 1031, discharge box body; 1032, discharge pipe; 1033, exhaust pipe. DETAILED DESCRIPTION
[0033] The concept, specific structure and generated technical effects of the present application will be described clearly and completely in combination with the embodiments and drawings to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments, and based on the embodiments of the present application, other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In addition, all the coupling / connection relationships involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation. The technical features in the creation of the present application can be combined interactively without conflict.
[0034] Term explanation:
[0035] White fertilizer is a fertilizer product derived from raffinate acid treatment, phosphoric acid production by-products or converted by a specific process. It contains rich nutrients, especially trace elements, which have a positive promoting effect on the growth and development of plants. In the fields of agriculture and phosphorus chemical industry, the preparation and utilization of white fertilizer is one of the important ways to improve resource utilization efficiency and reduce environmental pollution.
[0036] As shown in Figure 1 A drying device, comprising a drying granulator 1, a hot air pipe 1023 of the drying granulator 1 is connected to a heating assembly, an exhaust pipe 1033 of the drying granulator 1 is connected to a dust collector 2.
[0037] A feed pipe 1022 of the drying granulator 1 is connected to a concentrator 3, and a discharge pipe 1032 of the drying granulator 1 is connected to a conveyor 4.
[0038] Through the above technical solution, the high-temperature hot air generated by the heating assembly is transported into the drying granulator through the hot air pipe to quickly remove the water in the slurry or liquid, and then granulation is carried out; after the granulation is completed, the tail gas is discharged through the exhaust pipe.
[0039] And the slurry or liquid (white fertilizer) in the concentrator comes to the drying granulator through the feed pipe to carry out granulation, and the obtained particles are conveyed to the designated position by the conveyor through the discharge pipe.
[0040] In some embodiments, the heating assembly comprises a hot blast stove 5 connected to the hot air pipe 1023 of the drying granulator 1.
[0041] Specifically, the hot blast stove as a part of the heating assembly first generates heat energy by burning natural gas. The hot blast stove is connected to the hot air pipe of the drying granulator, and the heat energy generated by the hot blast stove is transmitted to the drying granulator through the hot air pipe.
[0042] In some embodiments, the heating assembly further comprises an air heater 6 connected to the hot blast stove 5, and a blower 7 connected to the air heater 6.
[0043] Specifically, the hot blast stove is also connected to an air heater, which is responsible for preheating the air entering the hot blast stove, thereby improving thermal efficiency. The air preheated by the air heater then enters the hot blast stove and combines with the heat energy generated in the hot blast stove to form high-temperature hot air.
[0044] The high-temperature hot air is transported to the drying granulator through the hot air pipe for drying the material. In order to ensure the quality of the hot air, the blower is connected after the air heater, which is responsible for providing sufficient air flow to the hot blast stove.
[0045] In specific embodiments, the air heater is used to heat the steam to 160℃ once, and then the hot blast stove is used to heat the air twice in series, which raises the inlet air temperature of the drying cylinder to a control range of 270℃-350℃, ensuring the efficiency and stability of the drying process. The operating parameters of the hot blast stove can be adjusted through the control cabinet and connected to the control system of the central control through the optical fiber cable, which is convenient for the operator to monitor and adjust in real time, ensuring the safety and efficiency of the drying process.
[0046] In some embodiments, a dehumidifier 8 is also connected to the blower 7.
[0047] Specifically, the blower is also connected to a dehumidifier, which is used to reduce the moisture carried in the air, ensuring that the air entering the hot blast stove is dry, thereby further improving the drying efficiency and effect.
[0048] In some embodiments, a cyclone separator 9 is also included, the feed end of the cyclone separator 9 is connected to the exhaust pipe 1033 of the drying granulator 1, and the air outlet end of the cyclone separator 9 is connected to the dust collector 2.
[0049] Specifically, the dust collector 2 is a bag-type dust collector 2. The filter bag material of the bag-type dust collector 2 is Gore membrane polyester needle felt.
[0050] More specifically, the feed end of the cyclone separator is connected to the exhaust pipe of the drying granulator, and larger particles are separated from the hot and humid gas by the action of centrifugal force. The bag-type dust collector uses Gore membrane polyester needle felt filter bag to filter out fine dust, ensuring that the discharged gas meets environmental protection standards.
[0051] As shown in Figure 2 some embodiments, the drying granulator 1 includes a rotating drum 101, a feed box 102, a discharge box 103, and a nozzle 104, the feed box and the discharge box 103 are respectively arranged at both ends of the rotating drum 101, and the nozzle 104 is arranged on the side of the feed box away from the rotating drum 101.
[0052] As Figure 2 and Figure 3 shown, in some embodiments, the feed tank includes a feed tank body 1021, a feed pipe 1022, and a hot air pipe 1023. The feed pipe 1022 passes through the feed tank body 1021 and is placed at one end of the feed tank away from the drum 101, and the other end of the feed pipe 1022 is placed in the drum 101.
[0053] The hot air pipe 1023 is fixedly connected with the feed tank body 1021 and is located at the side of the feed tank body 1021 away from the drum 101.
[0054] Specifically, the feed tank body 1021 is fixedly installed at the front end of the drying granulator and maintains a certain distance from the drum 101 to ensure that the slurry can smoothly enter the drum. One end of the feed pipe 1022 is connected with the concentrator 3, and the other end passes through the feed tank body 1021 and extends to the inside of the drum 101. The design of the feed pipe 1022 ensures uniform distribution of the slurry. The hot air pipe 1023 is fixedly connected with the feed tank body 1021 and is located at the side of the feed tank body 1021 away from the drum 101. The hot air pipe 1023 is connected with the hot air furnace 5 through a pipeline to ensure that the high-temperature hot air can be smoothly transmitted into the feed tank.
[0055] Therefore, by designing the feed pipe 1022 to pass through the feed tank body 1021 and being placed at one end of the feed tank away from the drum 101 and at the other end in the drum 101, it is ensured that the slurry can be uniformly distributed before entering the drum. At the same time, the high-temperature hot air introduced by the hot air pipe 1023 preheats the slurry in the feed tank, increases the contact area of the slurry with the hot air, and significantly improves the moisture removal efficiency.
[0056] In some embodiments, the discharge tank includes a discharge tank body 1031, a discharge pipe 1032, and an exhaust pipe 1033. The discharge pipe 1032 is arranged at the tail end of the bottom of the discharge tank body 1031. The exhaust pipe 1033 is installed at the side of the discharge tank body 1031 away from the drum 101.
[0057] Specifically, the discharge tank body 1031 is fixedly installed at the rear end of the drying granulator and maintains a certain distance from the drum 101 to ensure that the dried granular material can smoothly enter the discharge tank body 1031. The discharge pipe 1032 is arranged at the tail end of the bottom of the discharge tank body 1031 to ensure that the material can be smoothly discharged. The discharge pipe 1032 is fixedly connected with the discharge tank body 1031 and is connected with the conveyor 4 through a flange or other connecting member. The exhaust pipe 1033 is installed at the side of the discharge tank body 1031 away from the drum 101 to ensure that the wet hot gas can be effectively discharged. The exhaust pipe 1033 is fixedly connected with the discharge tank body 1031 and is connected with the cyclone separator 9 through a pipeline and finally connected to the bag-type dust collector 2.
[0058] Therefore, by the above technical solution, the discharge pipe 1032 is arranged at the tail end of the bottom of the discharge box body 1031, which ensures that the dried granular material can be smoothly discharged, avoiding material accumulation or blockage. The exhaust pipe 1033 is installed on the side of the discharge box body 1031 away from the rotary drum 101, which ensures that the wet hot gas can be effectively discharged and treated through the cyclone separator and the bag-type dust collector, reducing environmental pollution.
[0059] The drying device described in the present application has the following specific working process:
[0060] 1. Material input
[0061] The feed pipe of the drying granulator is connected to the concentrator. The liquid material in the concentrator is first subjected to concentration treatment to form slurry, which is then sent into the rotary drum of the drying granulator through the feed pipe.
[0062] 2. Hot air introduction
[0063] The hot air pipe of the drying granulator is connected to the heating assembly, which includes a hot air furnace, an air heater, and a blower. The hot air furnace generates high-temperature hot air by burning natural gas, the air heater preheats the air entering the hot air furnace, and the blower provides sufficient air flow and ensures that the air is dry. Under the joint action of these components, high-temperature hot air is generated and sent into the rotary drum of the drying granulator through the hot air pipe.
[0064] 3. Drying process
[0065] The slurry in the rotary drum is in contact with the high-temperature hot air, and the hot air carries away the moisture in the slurry, achieving rapid drying of the slurry and forming granular material. The design of the rotary drum allows the material to continuously turn inside, increasing the contact area between the slurry and the hot air and improving the drying efficiency.
[0066] 4. Discharge and exhaust
[0067] The dried granular material is discharged from the discharge box of the drying granulator through the discharge pipe, which is arranged at the tail end of the bottom of the discharge box body. At the same time, the wet hot gas generated during the drying process is discharged through the exhaust pipe, which is installed on the side of the discharge box body away from the rotary drum.
[0068] 5. Waste gas treatment
[0069] The exhaust pipe is connected to the cyclone separator, the inlet end of which receives the wet hot gas from the drying granulator and separates out larger granular material through centrifugal force. The outlet end of the cyclone separator is connected to the bag-type dust collector, and the filter bag material of the bag-type dust collector is Gore membrane polyester needle-punched felt, which can effectively filter out fine dust, ensuring that the discharged gas meets environmental protection standards.
[0070] The above describes the preferred embodiments of the present application, but the present application is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.
Claims
1. A drying apparatus, characterized by, The drying granulator (1) is connected to a heating assembly through a hot air pipe (1023), and the drying granulator (1) is connected to a dust collector (2) through an exhaust pipe (1033). The drying granulator (1) is connected to a concentrator (3) through a feeding pipe (1022), and the drying granulator (1) is connected to a conveyor (4) through a discharging pipe (1032).
2. A drying apparatus according to claim 1, wherein The heating assembly comprises a hot blast stove (5) connected to the hot air pipe (1023) of the drying granulator (1).
3. A drying apparatus as claimed in claim 2, wherein The heating assembly further comprises an air heater (6) connected to the hot blast stove (5) and a blower (7) connected to the air heater (6).
4. A drying apparatus as claimed in claim 3, wherein Further comprising a dehumidifier (8) connected to the blower (7).
5. The drying apparatus of claim 1, wherein Further comprising a cyclone separator (9) with a feeding end connected to the exhaust pipe (1033) of the drying granulator (1) and an air outlet end connected to the dust collector (2).
6. A drying apparatus as claimed in claim 5, wherein The dust collector (2) is a bag-type dust collector (2).
7. A drying apparatus as claimed in claim 6, wherein The filter bag material of the bag-type dust collector (2) is GORE coated polyester needle felt.
8. The drying apparatus of claim 1, wherein The drying granulator (1) comprises a rotating drum (101), a feeding box (102), a discharging box (103), and a nozzle (104), the feeding box (102) and the discharging box (103) are respectively arranged at both ends of the rotating drum (101), and the nozzle (104) is arranged on the side of the feeding box (102) away from the rotating drum (101).
9. A drying apparatus as claimed in claim 8, wherein The feeding box (102) comprises a feeding box body (1021), a feeding pipe (1022), and a hot air pipe (1023), the feeding pipe (1022) passes through the feeding box body (1021) and is arranged at one end on the side of the feeding box (102) away from the rotating drum (101), and the other end of the feeding pipe (1022) is arranged in the rotating drum (101); The hot air pipe (1023) is fixedly connected to the feeding box body (1021) and is arranged on the side of the feeding box body (1021) away from the rotating drum (101).
10. A drying apparatus as claimed in claim 8, wherein The discharging box (103) comprises a discharging box body (1031), a discharging pipe (1032), and an exhaust pipe (1033), the discharging pipe (1032) is arranged at the tail end of the bottom of the discharging box body (1031), and the exhaust pipe (1033) is arranged on the side of the discharging box body (1031) away from the rotating drum (101).