A drying device and drying process for nitro fertilizer production

Abstract

The present application provides a drying device for nitro fertilizer production and a drying process thereof, belonging to the technical field of nitro fertilizer drying devices, comprising a support frame, a drum and an air inlet assembly, wherein a first annular baffle and a second annular baffle are installed inside the feeding end of the drum, a circular sieve plate is connected between the first annular baffle and the second annular baffle, the circular sieve plate and the drum, a plurality of sieve holes are provided on the circular sieve plate, a plurality of partitions are provided in a cavity surrounded by the drum, the first annular baffle, the second annular baffle and the circular sieve plate, a drying cavity of equal volume is formed between two adjacent partitions, a powder collection box is fixedly installed on the support frame, and the powder collection box is provided with a powder collection hopper; the present application can separate the powder fertilizer from the granular fertilizer during the fertilizer drying process, reduce the hot air resources occupied by the powder, and accelerate the drying efficiency of the granular fertilizer.

Description

Technical Field

[0001] The present application relates to the technical field of nitro fertilizer drying devices, and in particular to a drying device for nitro fertilizer production and a drying process thereof. Background Art

[0002] The drying device for nitro fertilizer production is used in the fertilizer production process. After the fertilizer is granulated, the moisture content of the fertilizer particles is relatively high, which affects storage and transportation. Therefore, a drying device is needed to dry it. Among the common drying devices, the rotary drum dryer is usually composed of a slightly inclined cylinder with a lifting plate inside the cylinder to lift and disperse the material. The wet material is added from one end of the dryer. Under the action of the lifting plates evenly distributed in the inner cylinder, the material is evenly dispersed in the dryer and fully contacts with the hot air in the cylinder, which speeds up the drying of the material. The material moves forward under the combined action of the inclined cylinder and the hot air flow, and is finally discharged from the other end of the dryer.

[0003] Referring to the Chinese patent document with announcement number CN116182527U and the name of a drying device for fertilizer processing, the device includes a feed barrel, a drum and an air inlet pipe, a plurality of airbags are arranged in a circular array on the inner side of the drum, a fixed plate is fixedly connected to the counterclockwise side of the top of the airbag, a plurality of sieve holes are opened on the fixed plate, a bracket is arranged on the side of the fixed plate facing the inner wall of the drum, and a fixed head that can extend into the inner side of the sieve hole is fixedly connected to the side of the bracket close to the fixed plate. When in use, the formed granular fertilizer is filled into the feed barrel, and the fertilizer enters the drum from the feed barrel. When the airbag expands, the side of the airbag will push the bracket to drive the fixed head to extend into the inner side of the sieve hole on the surface of the fixed plate, and after the fixed head extends out of the surface of the fixed plate, the fixed head will receive the granular material that is about to fall onto the surface of the fixed plate on the surface of the fixed plate, and then the fixed head will flexibly receive it, reducing the cracking of the particles due to the impact on the fixed plate, which can improve the yield rate of the fertilizer.

[0004] Referring to the above technical solution, the granular fertilizer contains a certain amount of moisture in the initial state of formation, and a certain amount of powdered fertilizer may adhere to the surface. After a certain degree of hot air drying and turning, the adhesion between the powder and the granular fertilizer is reduced and separated. At this time, the powdered fertilizer is filled between the granular fertilizers, which is not conducive to the passage of hot air, and unqualified powdered fertilizers are not convenient for transportation and storage. Therefore, the powdered fertilizer occupies drying resources and affects the drying efficiency of the granular fertilizer. Summary of the invention

[0005] In view of this, the present application provides a drying device and a drying process for nitro fertilizer production, which are mainly used to solve the problem that powdered fertilizer occupies drying resources and reduces fertilizer drying efficiency.

[0006] In order to solve the above technical problems, the present application provides a drying device and a drying process for nitro fertilizer production.

[0007] In the first aspect, the present application provides a drying device for nitro fertilizer production, including a support frame, a drum and an air inlet assembly, the drum is driven by an external driving source; a first annular baffle and a second annular baffle are fixedly installed inside the feeding end of the drum, a circular sieve plate is connected between the first annular baffle and the second annular baffle, the circular sieve plate and the drum, a plurality of partitions are arranged between the drum, the first annular baffle, the second annular baffle and the circular sieve plate, and a drying chamber of equal volume is formed between each adjacent two partitions; a powder collection box is fixedly installed on the support frame, a powder collection hopper is extended from the powder collection box and abuts against the inner wall of the circular sieve plate, and the opening of the powder collection hopper abuts against the inner wall of the circular sieve plate; a feeding assembly is arranged on the first annular baffle and the powder collection box, the feeding assembly is used to allow fertilizer to enter the drying chamber, and a discharging assembly is arranged on the second annular baffle for driving the fertilizer into the middle part of the drum.

[0008] By adopting the above technical solution, a plurality of partitions are arranged in the cavity surrounded by the drum, the first annular baffle, the second annular baffle and the circular sieve plate, and the interior of the cavity is divided into a plurality of drying cavities of equal size, so that the granular fertilizers are dried in different drying cavities respectively, preventing the granular fertilizers from being piled up together, thereby improving the drying efficiency of the granular fertilizers.

[0009] When the granular fertilizer is dried to a certain degree, the powder fertilizer reduces its viscosity and can be separated from the surface of the granular fertilizer. When the drying chamber rotates to the upper side, most of the powder fertilizer is screened onto the powder collecting bucket. The powder fertilizer is separated from the drying chamber, which can increase the gap between the granular fertilizers and improve the drying efficiency of the granular fertilizers.

[0010] Optionally, the feed assembly includes a first feed port fixedly mounted on the powder collection box, and multiple second feed ports opened on the first circular baffle plate, each second feed port corresponds to a single drying chamber, and multiple feed baffles are slidably arranged on the outer wall of the first circular baffle plate, and feed baffle bars are arranged on the feed baffle plates, and the feed baffle bars are perpendicular to the feed baffle plates and extend toward the central axis of the drum.

[0011] By adopting the above technical solution, opening the feed baffle can allow the fertilizer to enter the drying chamber from the second feed port, and closing the feed baffle can allow the fertilizer to stay in the cavity portion connected between the first feed port and the second feed port.

[0012] Optionally, the inner wall of the first circular baffle is equipped with multiple switch doors through a reset torsion spring, and each switch door corresponds to a single second feed port. There is a storage chamber between the switch door and the second feed port, and the storage chamber is used for quantitative storage of fertilizers. A steel wire rope is connected between the switch door and the feed baffle, and the steel wire rope is used to drive the switch door to close.

[0013] By adopting the above technical scheme, the fertilizer is quantitatively stored in the storage chamber, and the total amount of fertilizer entering the drying chamber can be controlled to prevent excessive fertilizer from reducing the drying efficiency; when the feed baffle is opened, the wire rope can pull the switch door to close, and the fertilizer enters the storage chamber from the second feed port. When the feed baffle is closed, the switch door can be restored to its original position and open under the drive of the reset torsion spring, and the fertilizer inside the storage chamber enters the drying chamber.

[0014] Optionally, the discharging assembly includes multiple discharging ports opened on the second circular baffle plate, each discharging port corresponds to a single drying chamber, multiple discharging baffles are slidably arranged on the second circular baffle plate, and each discharging baffle plate is provided with a discharging baffle bar, which is perpendicular to the discharging baffle plate and extends toward the center axis of the drum.

[0015] By adopting the above technical solution and opening the discharge baffle, the fertilizer inside the drying chamber can be moved out of the drying chamber and rolled toward the discharge end of the drum.

[0016] Optionally, an auxiliary plate is fixedly mounted on the second annular baffle, and a support rod is fixedly mounted on the discharge baffle. The support rod passes through the auxiliary plate, and a spring is arranged around the support rod to drive the discharge baffle to reset.

[0017] By adopting the above technical solution, when the discharge baffle slides open, it can drive the spring to compress, which makes it convenient for the subsequent spring to release the elastic force when it is freed from the restraint, so that the discharge baffle can be reset.

[0018] Optionally, a transition plate is connected between the powder collection box and the powder collection hopper, and a push plate located on the powder collection hopper is fixedly installed directly above the transition plate, and the push plate is used to push the feed baffle to move. A pull plate is fixedly installed at the end of the powder collection hopper away from the powder collection box, and the pull plate is used to drive the discharge baffle to move.

[0019] By adopting the above technical solution, when the drying chamber rotates to the upper side, the feed baffle bar contacts the arc-shaped edge on the push plate, so that the feed baffle bar moves, thereby driving the feed baffle to open; when the drying chamber rotates to the lower side, the discharge baffle bar contacts the arc-shaped edge on the pull plate, so that the discharge baffle bar moves, thereby driving the discharge baffle to open.

[0020] Optionally, a plurality of curved slide plates are provided in the drum, and the curved slide plates are used to receive the fertilizer at the discharge port.

[0021] By adopting the above technical solution, the curved slide plate can receive the fertilizer flowing out of the discharge port, prevent the fertilizer from falling directly, and reduce the breakage of the fertilizer due to collision.

[0022] Optionally, the air inlet assembly includes a main pipe installed on a support frame, the main pipe is connected to a secondary pipe, the air outlets of the main pipe and the secondary pipe are connected to a protective shell, and the protective shell is rotatably connected to the drum and corresponds to the material separation assembly position.

[0023] By adopting the above technical solution, the main pipeline and the secondary pipeline respectively fill the hot gas resources into the interior of the protective shell, which can improve the filling efficiency of the hot gas resources compared to a single pipeline.

[0024] In a second aspect, the present application provides a drying process for nitro fertilizer production, which is applied to the drying device for nitro fertilizer production described in the first aspect, and the drying process for nitro fertilizer production includes:

[0025] S1, quantitative storage of fertilizer: Fertilizer with a certain humidity enters from the first feed port, and the drying chamber rotates synchronously with the drum. When the drying chamber corresponds to the second feed port, the push plate pushes the feed baffle to open the second feed port, and the synchronous wire rope drives the switch door to close, and the material enters the storage chamber from the second feed port;

[0026] S2, quantitative feeding: when the drying chamber is away from the second feeding port, the feeding baffle is closed, the reset torsion spring drives the switch door to reset and open, and the granular fertilizer in the storage chamber enters the drying chamber;

[0027] S3, screening powder fertilizer: during the drying process of granular fertilizer, powder fertilizer falls from the surface of granular fertilizer. When the drying chamber rotates to the upper side, most of the powder fertilizer falls from the sieve holes of the circular sieve plate into the powder collecting hopper;

[0028] S4, discharging: When the drying chamber rotates to the bottom, the pull plate drives the discharging baffle to slide, and the granular fertilizer dried to a certain degree falls from the discharging port. The curved slide board receives the fertilizer, and the fertilizer moves to the discharging end in the rotating drum.

[0029] By adopting the above technical solution, multiple drying chambers are set up, which can separate wet fertilizers and prevent fertilizers from piling up. The drying efficiency can be improved during drying. Adding quantitative wet fertilizers into the drying chambers can further improve the drying efficiency. When the fertilizers are dried to a certain extent, most of the powdered fertilizers detach from the surface of the granular fertilizers and fall from the sieve holes of the circular sieve plate into the powder collecting hopper. The powdered fertilizers are collected in a centralized manner, the gaps between the granular fertilizers are increased, and the utilization rate of thermal resources is improved.

[0030] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0031] 1. When the fertilizer is dried to a certain degree, the powder fertilizer will separate from the granular fertilizer, and most of the powder fertilizer will pass through the sieve holes and be collected centrally, which can reduce the thermal resources used in the subsequent use of the powder fertilizer. At the same time, it can increase the gap between the granular fertilizers and speed up the drying efficiency of the granular fertilizers by thermal resources.

[0032] 2. Split the large drying chamber into multiple small drying chambers of equal volume, and put a certain amount of fertilizer in each small drying chamber to prevent the fertilizer from piling up and speed up the drying efficiency of the fertilizer.

[0033] 3. Two air inlets are set to introduce heat resources into the fertilizer-carrying cavity, which can further accelerate the drying efficiency of the fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of a drying device for producing nitro fertilizers in this application;

[0035] Figure 2 A cross-sectional view of the drum of this application;

[0036] Figure 3 An exploded view of the roller and powder collection box for this application;

[0037] Figure 4 This is a schematic diagram of the structure of the feed assembly for this application;

[0038] Figure 5 This is a schematic diagram of the air inlet assembly and outlet structure of this application;

[0039] Figure 6 This is a schematic diagram of the discharge assembly structure for this application;

[0040] Figure 7 This is a cross-sectional view of the first annular baffle and the second annular baffle of the present application;

[0041] Figure 8 This is a schematic diagram of the powder collection box and powder collection hopper structure of this application.

[0042] Explanation of the reference numerals in the accompanying drawings: 1. Support frame; 2. Roller; 21. Curved skateboard; 3. Air inlet assembly; 31. Main pipeline; 32. Secondary pipeline; 33. Protective shell; 4. Material separation assembly; 41. First annular baffle; 42. Second annular baffle; 43. Circular sieve plate; 44. Partition plate; 45. Powder collection box; 46. Powder collection hopper; 47. Transition plate; 5. Feed assembly; 51. First feed port; 52. Second feed port; 53. Feed baffle; 54. Feed baffle bar; 55. Push plate; 6. Quantitative storage assembly; 61. Open / close door; 62. Wire rope; 7. Discharge assembly; 71. Discharge port; 72. Discharge baffle; 73. Discharge baffle bar; 74. Auxiliary plate; 75. Support rod; 76. Spring; 77. Pull plate; 78. Sliding rod; 79. Hook. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the embodiments of the present application. Figure 1-Figure 8 , the technical scheme of the embodiment of the present application is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0044] In the first aspect, the present application provides a drying device for nitro fertilizer production, which adopts the following technical solution:

[0045] Reference Figure 1 , Figure 4 , Figure 6 and Figure 7 The present embodiment provides a drying device for nitro fertilizer production, comprising a support frame 1, an air inlet assembly 3, a material separation assembly 4, a feed assembly 5, a quantitative storage assembly 6 and a discharge assembly 7. A drum 2 is rotatably mounted on the support frame 1, the arc surface of the drum 2 is placed horizontally, the drum 2 is driven by an external drive member, the air inlet assembly 3 transports hot air resources to the inside of the material separation assembly 4, the material separation assembly 4 is fixedly mounted at the feeding end of the drum 2, the material separation assembly 4 is used to separate quantitative fertilizers, the feed assembly 5 and the quantitative storage assembly 6 are mounted at the feeding end of the material separation assembly 4, the discharge assembly 7 is mounted at the discharge end of the material separation assembly 4, and the quantitative storage assembly 6 stores a certain amount of moisture fertilizer.

[0046] Reference Figure 1 , Figure 4 , Figure 7 and Figure 8The material separation assembly 4 includes a first annular baffle 41 , a second annular baffle 42 , a circular sieve plate 43 , a partition plate 44 , a powder collecting box 45 , a powder collecting hopper 46 and a transition plate 47 . The first annular baffle 41 and the second annular baffle 42 are both fixedly mounted on the inner wall of the feeding end of the drum 2, the first annular baffle 41 and the second annular ring are set as annular plates of a certain thickness, a circular sieve plate 43 is connected between the first annular baffle 41 and the second annular ring, the circular sieve plate 43 and the drum 2 are set as concentric axes, the first annular baffle 41 and the second annular ring are respectively located on both sides of the arc edge of the circular sieve plate 43, the first annular baffle 41 is close to the feeding end of the drum 2, and the second annular baffle 42 is far away from the feeding end of the drum 2, a plurality of sieve holes are opened on the circular sieve plate 43, a plurality of partitions 44 are arranged in the cavity surrounded by the drum 2, the first annular baffle 41, the drum 2, the first annular baffle 41, the second annular baffle 42 and the circular sieve plate 43, the partitions 44 are set as curved arc plates, and drying chambers of equal size are formed between each adjacent two partitions 44, and the curved surface of the partitions 44 can increase the contact area between the fertilizer and the partitions 44, thereby accelerating the drying efficiency of the fertilizer.

[0047] The powder collecting box 45 is fixedly mounted on the support frame 1 and is located at the feeding end of the drum 2. A transition plate 47 is installed on the powder collecting box 45. The transition plate 47 is set as a closed curved arc plate. The interior of the transition plate 47 is set as a transition cavity with a hollow structure. A powder collecting hopper 46 is connected to the transition plate 47. The opening of the powder collecting hopper 46 abuts against the inner wall of the circular sieve plate 43. The transition cavity connects the powder collecting hopper 46 and the powder collecting box 45. The powder collecting hopper 46 consists of an arc plate and two side plates. A sliding door is installed on the powder collecting box 45. The sliding door facilitates the removal of the powder fertilizer collected inside the powder collecting box 45.

[0048] During use, a certain weight of wet granular fertilizer enters the drying chamber. After the fertilizer is dried to a certain degree, the powder fertilizer reduces its viscosity and separates from the surface of the granular fertilizer. When the drying chamber rotates upward to correspond to the opening on the powder collecting bucket 46, the powder fertilizer will fall from the sieve holes of the circular sieve plate 43 to the powder collecting bucket 46, and fall along the powder collecting bucket 46 to the transition chamber and the inside of the powder collecting box 45. After the powder collecting box 45 collects a certain amount of powder fertilizer, the sliding door on the powder collecting box 45 is opened to clean the powder fertilizer in a centralized manner.

[0049] Reference Figure 4 and Figure 7The feed assembly 5 includes a first feed port 51, a second feed port 52, a feed baffle 53, a feed baffle bar 54 and a push plate 55. A feed hopper is fixedly installed on the powder collection box 45, and a first feed port 51 is provided on the feed hopper. A plurality of second feed ports 52 are provided on the first annular baffle 41. Each second feed port 52 corresponds to a single drying chamber. When the drying chamber rotates to the upper side, the first feed port 51 and the second feed port 52 on the upper drying chamber are in a connected state. A plurality of sliding grooves are provided on the outer wall of the first annular baffle 41. Feed baffles 53 are slidably provided on the two sliding grooves. A plurality of feed baffles 53 are provided. A single feed baffle 53 corresponds to a single second feed port. The opening 52 and the feed baffle 53 are both provided with a feed baffle bar 54, the feed baffle bar 54 is perpendicular to the feed baffle plate 53 and extends toward the central axis of the drum 2, and a push plate 55 is fixedly installed on the side plate of the powder collecting hopper 46 close to the powder collecting box 45, the push plate 55 is a quadrilateral plate, the left and right surfaces of the quadrilateral plate are inclined from bottom to top toward the middle part, the upper and lower surfaces of the quadrilateral plate are arc-shaped surfaces, and the arc-shaped surfaces protrude from the outer wall of the drum 2, and the push plate 55 is used to push the feed baffle bar 54 to move, so as to facilitate the opening of the feed baffle plate 53.

[0050] Reference Figure 4 , Figure 5 and Figure 7 The quantitative storage assembly 6 includes a switch door 61 and a wire rope 62. The inner wall of the first annular baffle 41 is provided with a plurality of switch doors 61 through a reset torsion spring, and each switch door 61 corresponds to a single second feed port 52. When the drying chamber rotates to the upper side, the reset torsion spring is located above the second feed port 52, and the switch door 61 is opened and closed from the lower side of the second feed port 52. The cavity formed between the switch door 61 and the second feed port 52 is a storage cavity, which is used for quantitative storage of fertilizers. A wire rope 62 is arranged between the switch door 61 and the feed baffle 53. When the feed baffle 53 moves upward and opens, the wire rope 62 drives the switch door 61 to close, and the wet fertilizer enters the storage cavity. When the feed baffle 53 moves downward and closes, the reset torsion spring drives the switch door 61 to reset and open.

[0051] When in use, the wet fertilizer enters from the first feed port 51. During the process of the drying chamber and the push plate 55 rotating to the upper side, the feed baffle 54 contacts the inclined surface of the edge of the push plate 55 until it contacts the top arc surface of the push plate 55. The push plate 55 pushes the feed baffle 54 upward, and the feed baffle 53 then moves upward and opens. While the feed baffle 53 is opening, the wire rope 62 is pulled to drive the switch door 61 to close, and a certain amount of fertilizer enters the storage chamber; when the drying chamber and the push plate 55 continue to rotate, the push plate 55 gradually breaks away from the limit of the feed baffle 54, the feed baffle 53 is reset, and the switch door 61 is reset to the open state under the action of the reset torsion spring, and the fertilizer in the storage chamber enters the drying chamber.

[0052] Reference Figure 5 , Figure 6 and Figure 8 The discharging assembly 7 includes a discharging port 71 , a sliding rod, a discharging baffle 72 , a discharging baffle bar 73 , a hook, an auxiliary plate 74 , a supporting rod 75 , a spring 76 and a pulling plate 77 . The discharge ports 71 are arranged in a plurality and are all opened on the second annular baffle 42, and a single discharge port 71 corresponds to a single drying chamber. A plurality of sliding rods are arranged on the outer wall of the second annular baffle 42, and a discharge baffle 72 is slidably installed on the two sliding rods. The discharge baffle 72 is arranged in a plurality and a single discharge baffle 72 corresponds to a single discharge port 71. A discharge baffle bar 73 is arranged on the discharge baffle 72, and a hook is installed on the end of the discharge baffle bar 73. An auxiliary plate 74 is fixedly installed on the sliding rod, and a support rod 75 is fixedly installed on the discharge baffle 72, and the support rod 75 penetrates the auxiliary plate 74. A spring 76 is arranged around the support rod 75, and both ends of the spring 76 are connected to the auxiliary plate 74 and the discharge baffle 72 respectively. When the discharge baffle 72 is opened, the spring 76 is used to drive the discharge baffle 72 to reset.

[0053] A pull plate 77 is fixedly installed on the side wall of the powder collecting hopper 46 away from the powder collecting box 45. The pull plate 77 has the same shape as the push plate 55. The pull plate 77 is used to drive the hook to move, and then drive the hook on the discharge baffle 73 to contact the inclined surface on the pull plate 77. The inclined surface pulls the hook to move toward the center of the drum 2. The pull plate 77 is used to drive the discharge baffle 73 to move, open the discharge baffle 72, and allow the dry fertilizer to flow out.

[0054] When in use, the push plate 55 rotates with the drum 2. When the push plate 55 rotates counterclockwise from bottom to top, the hook contacts the inclined surface of the push plate 55, and the inclined surface drives the hook to move toward the center of the drum 2, and then the discharging baffle 73 moves, driving the discharging baffle 72 to open. At this time, the spring 76 is in a compressed state, and the dried fertilizer inside the drying chamber flows out and moves toward the center and the discharging end of the drum 2. When the pull plate 77 is freed from the restraint on the hook, the elastic force of the spring 76 is released, driving the discharging baffle 72 to reset.

[0055] Reference Figure 1 and Figure 2 The air inlet assembly 3 includes a main pipe 31, a secondary pipe 32 and a protective shell 33. The main pipe 31 is installed on the support frame 1, the secondary pipe 32 is connected to the main pipe 31, and the air outlets of the main pipe 31 and the secondary pipe 32 are connected to the protective shell 33, which is rotatably connected to the drum 2, and the protective shell 33 corresponds to the material separation assembly 4. The drum 2 corresponding to the protective shell 33 is provided with air holes to facilitate the hot air to be transported to the drying chamber.

[0056] Reference Figure 2 , Figure 3 and Figure 5A curved slide plate 21 is provided on the inner wall of the drum 2 , and the curved slide plate 21 is fixedly connected to the second annular baffle 42 and is located below the discharge port 71 .

[0057] When in use, the main pipe 31 and the secondary pipe 32 simultaneously transport hot air resources into the drying chamber, which can improve the drying efficiency of the fertilizer; when the fertilizer flows out of the drying chamber, the curved slide plate 21 receives the fertilizer to prevent the fertilizer from falling directly into the drum 2 and preventing the fertilizer from breaking.

[0058] The implementation principle of a drying device for nitro fertilizer production in the embodiment of the present application is:

[0059] When in use, first, the drum 2 is driven to rotate counterclockwise through the external driving member, and the air inlet component 3 transports hot air resources into the drying chamber to fill the fertilizer into the first feed port 51. When the drying chamber rotates upward, the push plate 55 pushes the feed baffle 54 to move upward, and then opens the feed baffle 53. During the upward movement of the feed baffle 53, the wire rope 62 is pulled, and the wire rope 62 drives the switch door 61 to close, and a certain amount of wet fertilizer enters the storage chamber. When the push plate 55 is freed from the restraint on the feed baffle 54, the switch door 61 is reset to an open state driven by the reset torsion spring, and the wire rope 62 is then reset and pulls the feed baffle 53 to close, and the fertilizer in the storage chamber enters the drying chamber, and the hot air dries the fertilizer inside the drying chamber. When the powder fertilizer separates from the surface of the granular fertilizer, the drying chamber rotates to the top, and the powder fertilizer falls from the sieve hole to the powder collection bucket 46.

[0060] Afterwards, when the drying chamber rotates counterclockwise from bottom to top, the pull plate 77 pulls the hook, the discharge baffle 73 and the discharge baffle 72 toward the center of the drum 2, opens the discharge baffle 72, and the fertilizer inside the drying chamber flows out from the discharge port 71. Under the rotation of the drum 2, the fertilizer moves to the middle part and the discharge end of the drum 2.

[0061] In a second aspect, the present application provides a drying process for nitro fertilizer production, which is applied to a drying device for nitro fertilizer production in the first aspect, and the drying process for nitro fertilizer production includes:

[0062] S1, quantitative storage of fertilizer: Fertilizer with a certain humidity enters from the first feed port 51, and the drying chamber rotates synchronously with the drum 2. When the drying chamber corresponds to the second feed port 52, the push plate 55 pushes the feed baffle 53 to open the second feed port 52, and the synchronous wire rope 62 drives the switch door 61 to close, and the material enters the storage chamber from the second feed port 52;

[0063] S2, quantitative feeding: when the drying chamber is away from the second feeding port 52, the feeding baffle 53 is closed, the reset torsion spring drives the switch door 61 to reset and open, and the granular fertilizer in the storage chamber enters the drying chamber;

[0064] S3, screening powder fertilizer: during the drying process of the granular fertilizer, the powder fertilizer falls from the surface of the granular fertilizer. When the drying chamber rotates to the upper side, most of the powder fertilizer falls from the sieve holes of the circular sieve plate 43 into the powder collecting hopper 46;

[0065] S4, discharging: When the drying chamber rotates to the bottom, the pull plate 77 drives the discharging baffle 72 to slide, and the granular fertilizer dried to a certain degree falls from the discharging port 71, and the curved slide plate 21 receives the fertilizer, and the fertilizer moves toward the discharging end in the rotating drum 2.

[0066] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A drying device for nitro fertilizer production, comprising a support frame, a drum and an air inlet assembly, wherein the drum is driven by an external driving source, and characterized in that: A first annular baffle and a second annular baffle are fixedly installed inside the feeding end of the drum, a circular sieve plate is connected between the first annular baffle and the second annular baffle, the circular sieve plate and the drum are coaxial, a plurality of partitions are arranged in the cavity surrounded by the drum, the first annular baffle, the second annular baffle and the circular sieve plate, and a drying cavity of equal volume is formed between every two adjacent partitions; A powder collection box is fixedly mounted on the support frame, a powder collection hopper is extended from the powder collection box and abuts against the inner wall of the circular sieve plate, and an opening of the powder collection hopper abuts against the inner wall of the circular sieve plate; The first annular baffle and the powder collection box are provided with a feeding assembly, which is used to allow the fertilizer to enter the drying chamber, and the second annular baffle is provided with a discharging assembly for driving the fertilizer into the middle part of the drum; The feed assembly includes a first feed port fixedly mounted on the powder collection box, and a plurality of second feed ports opened on the first annular baffle plate, each second feed port corresponds to a single drying chamber, and a plurality of feed baffle plates are slidably arranged on the outer wall of the first annular baffle plate, and each feed baffle plate is provided with a feed baffle bar, and the feed baffle bar is perpendicular to the feed baffle plate and extends toward the central axis of the drum; The inner wall of the first circular baffle is equipped with multiple switch doors through a reset torsion spring, and each switch door corresponds to a single second feed port. There is a storage chamber between the switch door and the second feed port, and the storage chamber is used for quantitative storage of fertilizer. A steel wire rope is connected between the switch door and the feed baffle, and the steel wire rope is used to drive the switch door to close.

2. A drying device for nitro fertilizer production according to claim 1, characterized in that: The discharging assembly includes multiple discharging ports opened on the second annular baffle plate, each discharging port corresponds to a single drying chamber, multiple discharging baffles are slidably arranged on the second annular baffle plate, each discharging baffle plate is provided with a discharging baffle bar, the discharging baffle bar is perpendicular to the discharging baffle plate and extends toward the central axis of the drum.

3. A drying device for nitro fertilizer production according to claim 2, characterized in that: An auxiliary plate is fixedly mounted on the second annular baffle, and a support rod is fixedly mounted on the discharge baffle. The support rod passes through the auxiliary plate, and a spring for driving the discharge baffle to return to its original position is arranged around the support rod.

4. A drying device for nitro fertilizer production according to claim 3, characterized in that: A transition plate is connected between the powder collecting box and the powder collecting hopper, and a push plate located on the powder collecting hopper is fixedly installed directly above the transition plate, and the push plate is used to push the feed baffle to move. A pull plate is fixedly installed at the end of the powder collecting hopper away from the powder collecting box, and the pull plate is used to drive the discharge baffle to move.

5. A drying device for nitro fertilizer production according to claim 4, characterized in that: A plurality of curved slide plates are arranged in the drum, and the curved slide plates are used to receive the fertilizer at the discharge port.

6. A drying device for nitro fertilizer production according to claim 5, characterized in that: The air inlet assembly includes a main pipeline installed on a support frame, the main pipeline is connected to a secondary pipeline, the air outlets of the main pipeline and the secondary pipeline are connected to a protective shell, and the protective shell is rotatably connected to the drum and corresponds to the material separation assembly position.

7. A drying process for nitro fertilizer production, applied to the drying device according to claim 6, characterized in that: The drying process includes: S1, quantitative storage of fertilizer: Fertilizer with a certain humidity enters from the first feed port, and the drying chamber rotates synchronously with the drum. When the drying chamber corresponds to the second feed port, the push plate pushes the feed baffle to open the second feed port, and the synchronous wire rope drives the switch door to close, and the material enters the storage chamber from the second feed port; S2, quantitative feeding: when the drying chamber is away from the second feeding port, the feeding baffle is closed, the reset torsion spring drives the switch door to reset and open, and the granular fertilizer in the storage chamber enters the drying chamber; S3, screening powder fertilizer: during the drying process of granular fertilizer, powder fertilizer falls from the surface of granular fertilizer. When the drying chamber rotates to the upper side, most of the powder fertilizer falls from the sieve holes of the circular sieve plate into the powder collecting hopper; S4, discharging: When the drying chamber rotates to the bottom, the pull plate drives the discharging baffle to slide, and the granular fertilizer dried to a certain degree falls from the discharging port. The curved slide board receives the fertilizer, and the fertilizer moves to the discharging end in the rotating drum.

Images